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• What Is a Case Study? | Definition, Examples & Methods

What Is a Case Study? | Definition, Examples & Methods

Published on May 8, 2019 by Shona McCombes . Revised on November 20, 2023.

A case study is a detailed study of a specific subject, such as a person, group, place, event, organization, or phenomenon. Case studies are commonly used in social, educational, clinical, and business research.

A case study research design usually involves qualitative methods , but quantitative methods are sometimes also used. Case studies are good for describing , comparing, evaluating and understanding different aspects of a research problem .

Table of contents

When to do a case study, step 1: select a case, step 2: build a theoretical framework, step 3: collect your data, step 4: describe and analyze the case, other interesting articles.

A case study is an appropriate research design when you want to gain concrete, contextual, in-depth knowledge about a specific real-world subject. It allows you to explore the key characteristics, meanings, and implications of the case.

Case studies are often a good choice in a thesis or dissertation . They keep your project focused and manageable when you don’t have the time or resources to do large-scale research.

You might use just one complex case study where you explore a single subject in depth, or conduct multiple case studies to compare and illuminate different aspects of your research problem.

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Once you have developed your problem statement and research questions , you should be ready to choose the specific case that you want to focus on. A good case study should have the potential to:

• Provide new or unexpected insights into the subject
• Challenge or complicate existing assumptions and theories
• Propose practical courses of action to resolve a problem
• Open up new directions for future research

TipIf your research is more practical in nature and aims to simultaneously investigate an issue as you solve it, consider conducting action research instead.

Unlike quantitative or experimental research , a strong case study does not require a random or representative sample. In fact, case studies often deliberately focus on unusual, neglected, or outlying cases which may shed new light on the research problem.

Example of an outlying case studyIn the 1960s the town of Roseto, Pennsylvania was discovered to have extremely low rates of heart disease compared to the US average. It became an important case study for understanding previously neglected causes of heart disease.

However, you can also choose a more common or representative case to exemplify a particular category, experience or phenomenon.

Example of a representative case studyIn the 1920s, two sociologists used Muncie, Indiana as a case study of a typical American city that supposedly exemplified the changing culture of the US at the time.

While case studies focus more on concrete details than general theories, they should usually have some connection with theory in the field. This way the case study is not just an isolated description, but is integrated into existing knowledge about the topic. It might aim to:

• Exemplify a theory by showing how it explains the case under investigation
• Expand on a theory by uncovering new concepts and ideas that need to be incorporated
• Challenge a theory by exploring an outlier case that doesn’t fit with established assumptions

To ensure that your analysis of the case has a solid academic grounding, you should conduct a literature review of sources related to the topic and develop a theoretical framework . This means identifying key concepts and theories to guide your analysis and interpretation.

There are many different research methods you can use to collect data on your subject. Case studies tend to focus on qualitative data using methods such as interviews , observations , and analysis of primary and secondary sources (e.g., newspaper articles, photographs, official records). Sometimes a case study will also collect quantitative data.

Example of a mixed methods case studyFor a case study of a wind farm development in a rural area, you could collect quantitative data on employment rates and business revenue, collect qualitative data on local people’s perceptions and experiences, and analyze local and national media coverage of the development.

The aim is to gain as thorough an understanding as possible of the case and its context.

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In writing up the case study, you need to bring together all the relevant aspects to give as complete a picture as possible of the subject.

How you report your findings depends on the type of research you are doing. Some case studies are structured like a standard scientific paper or thesis , with separate sections or chapters for the methods , results and discussion .

Others are written in a more narrative style, aiming to explore the case from various angles and analyze its meanings and implications (for example, by using textual analysis or discourse analysis ).

In all cases, though, make sure to give contextual details about the case, connect it back to the literature and theory, and discuss how it fits into wider patterns or debates.

If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples.

• Normal distribution
• Degrees of freedom
• Null hypothesis
• Discourse analysis
• Control groups
• Mixed methods research
• Non-probability sampling
• Quantitative research
• Ecological validity

Research bias

• Rosenthal effect
• Implicit bias
• Cognitive bias
• Selection bias
• Negativity bias
• Status quo bias

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A case study research paper examines a person, place, event, condition, phenomenon, or other type of subject of analysis in order to extrapolate  key themes and results that help predict future trends, illuminate previously hidden issues that can be applied to practice, and/or provide a means for understanding an important research problem with greater clarity. A case study research paper usually examines a single subject of analysis, but case study papers can also be designed as a comparative investigation that shows relationships between two or more subjects. The methods used to study a case can rest within a quantitative, qualitative, or mixed-method investigative paradigm.

Case Studies. Writing@CSU. Colorado State University; Mills, Albert J. , Gabrielle Durepos, and Eiden Wiebe, editors. Encyclopedia of Case Study Research . Thousand Oaks, CA: SAGE Publications, 2010 ; “What is a Case Study?” In Swanborn, Peter G. Case Study Research: What, Why and How? London: SAGE, 2010.

How to Approach Writing a Case Study Research Paper

General information about how to choose a topic to investigate can be found under the " Choosing a Research Problem " tab in the Organizing Your Social Sciences Research Paper writing guide. Review this page because it may help you identify a subject of analysis that can be investigated using a case study design.

However, identifying a case to investigate involves more than choosing the research problem . A case study encompasses a problem contextualized around the application of in-depth analysis, interpretation, and discussion, often resulting in specific recommendations for action or for improving existing conditions. As Seawright and Gerring note, practical considerations such as time and access to information can influence case selection, but these issues should not be the sole factors used in describing the methodological justification for identifying a particular case to study. Given this, selecting a case includes considering the following:

• The case represents an unusual or atypical example of a research problem that requires more in-depth analysis? Cases often represent a topic that rests on the fringes of prior investigations because the case may provide new ways of understanding the research problem. For example, if the research problem is to identify strategies to improve policies that support girl's access to secondary education in predominantly Muslim nations, you could consider using Azerbaijan as a case study rather than selecting a more obvious nation in the Middle East. Doing so may reveal important new insights into recommending how governments in other predominantly Muslim nations can formulate policies that support improved access to education for girls.
• The case provides important insight or illuminate a previously hidden problem? In-depth analysis of a case can be based on the hypothesis that the case study will reveal trends or issues that have not been exposed in prior research or will reveal new and important implications for practice. For example, anecdotal evidence may suggest drug use among homeless veterans is related to their patterns of travel throughout the day. Assuming prior studies have not looked at individual travel choices as a way to study access to illicit drug use, a case study that observes a homeless veteran could reveal how issues of personal mobility choices facilitate regular access to illicit drugs. Note that it is important to conduct a thorough literature review to ensure that your assumption about the need to reveal new insights or previously hidden problems is valid and evidence-based.
• The case challenges and offers a counter-point to prevailing assumptions? Over time, research on any given topic can fall into a trap of developing assumptions based on outdated studies that are still applied to new or changing conditions or the idea that something should simply be accepted as "common sense," even though the issue has not been thoroughly tested in current practice. A case study analysis may offer an opportunity to gather evidence that challenges prevailing assumptions about a research problem and provide a new set of recommendations applied to practice that have not been tested previously. For example, perhaps there has been a long practice among scholars to apply a particular theory in explaining the relationship between two subjects of analysis. Your case could challenge this assumption by applying an innovative theoretical framework [perhaps borrowed from another discipline] to explore whether this approach offers new ways of understanding the research problem. Taking a contrarian stance is one of the most important ways that new knowledge and understanding develops from existing literature.
• The case provides an opportunity to pursue action leading to the resolution of a problem? Another way to think about choosing a case to study is to consider how the results from investigating a particular case may result in findings that reveal ways in which to resolve an existing or emerging problem. For example, studying the case of an unforeseen incident, such as a fatal accident at a railroad crossing, can reveal hidden issues that could be applied to preventative measures that contribute to reducing the chance of accidents in the future. In this example, a case study investigating the accident could lead to a better understanding of where to strategically locate additional signals at other railroad crossings so as to better warn drivers of an approaching train, particularly when visibility is hindered by heavy rain, fog, or at night.
• The case offers a new direction in future research? A case study can be used as a tool for an exploratory investigation that highlights the need for further research about the problem. A case can be used when there are few studies that help predict an outcome or that establish a clear understanding about how best to proceed in addressing a problem. For example, after conducting a thorough literature review [very important!], you discover that little research exists showing the ways in which women contribute to promoting water conservation in rural communities of east central Africa. A case study of how women contribute to saving water in a rural village of Uganda can lay the foundation for understanding the need for more thorough research that documents how women in their roles as cooks and family caregivers think about water as a valuable resource within their community. This example of a case study could also point to the need for scholars to build new theoretical frameworks around the topic [e.g., applying feminist theories of work and family to the issue of water conservation].

Eisenhardt, Kathleen M. “Building Theories from Case Study Research.” Academy of Management Review 14 (October 1989): 532-550; Emmel, Nick. Sampling and Choosing Cases in Qualitative Research: A Realist Approach . Thousand Oaks, CA: SAGE Publications, 2013; Gerring, John. “What Is a Case Study and What Is It Good for?” American Political Science Review 98 (May 2004): 341-354; Mills, Albert J. , Gabrielle Durepos, and Eiden Wiebe, editors. Encyclopedia of Case Study Research . Thousand Oaks, CA: SAGE Publications, 2010; Seawright, Jason and John Gerring. "Case Selection Techniques in Case Study Research." Political Research Quarterly 61 (June 2008): 294-308.

Structure and Writing Style

The purpose of a paper in the social sciences designed around a case study is to thoroughly investigate a subject of analysis in order to reveal a new understanding about the research problem and, in so doing, contributing new knowledge to what is already known from previous studies. In applied social sciences disciplines [e.g., education, social work, public administration, etc.], case studies may also be used to reveal best practices, highlight key programs, or investigate interesting aspects of professional work.

In general, the structure of a case study research paper is not all that different from a standard college-level research paper. However, there are subtle differences you should be aware of. Here are the key elements to organizing and writing a case study research paper.

I.  Introduction

As with any research paper, your introduction should serve as a roadmap for your readers to ascertain the scope and purpose of your study . The introduction to a case study research paper, however, should not only describe the research problem and its significance, but you should also succinctly describe why the case is being used and how it relates to addressing the problem. The two elements should be linked. With this in mind, a good introduction answers these four questions:

• What is being studied? Describe the research problem and describe the subject of analysis [the case] you have chosen to address the problem. Explain how they are linked and what elements of the case will help to expand knowledge and understanding about the problem.
• Why is this topic important to investigate? Describe the significance of the research problem and state why a case study design and the subject of analysis that the paper is designed around is appropriate in addressing the problem.
• What did we know about this topic before I did this study? Provide background that helps lead the reader into the more in-depth literature review to follow. If applicable, summarize prior case study research applied to the research problem and why it fails to adequately address the problem. Describe why your case will be useful. If no prior case studies have been used to address the research problem, explain why you have selected this subject of analysis.
• How will this study advance new knowledge or new ways of understanding? Explain why your case study will be suitable in helping to expand knowledge and understanding about the research problem.

Each of these questions should be addressed in no more than a few paragraphs. Exceptions to this can be when you are addressing a complex research problem or subject of analysis that requires more in-depth background information.

II.  Literature Review

The literature review for a case study research paper is generally structured the same as it is for any college-level research paper. The difference, however, is that the literature review is focused on providing background information and  enabling historical interpretation of the subject of analysis in relation to the research problem the case is intended to address . This includes synthesizing studies that help to:

• Place relevant works in the context of their contribution to understanding the case study being investigated . This would involve summarizing studies that have used a similar subject of analysis to investigate the research problem. If there is literature using the same or a very similar case to study, you need to explain why duplicating past research is important [e.g., conditions have changed; prior studies were conducted long ago, etc.].
• Describe the relationship each work has to the others under consideration that informs the reader why this case is applicable . Your literature review should include a description of any works that support using the case to investigate the research problem and the underlying research questions.
• Identify new ways to interpret prior research using the case study . If applicable, review any research that has examined the research problem using a different research design. Explain how your use of a case study design may reveal new knowledge or a new perspective or that can redirect research in an important new direction.
• Resolve conflicts amongst seemingly contradictory previous studies . This refers to synthesizing any literature that points to unresolved issues of concern about the research problem and describing how the subject of analysis that forms the case study can help resolve these existing contradictions.
• Point the way in fulfilling a need for additional research . Your review should examine any literature that lays a foundation for understanding why your case study design and the subject of analysis around which you have designed your study may reveal a new way of approaching the research problem or offer a perspective that points to the need for additional research.
• Expose any gaps that exist in the literature that the case study could help to fill . Summarize any literature that not only shows how your subject of analysis contributes to understanding the research problem, but how your case contributes to a new way of understanding the problem that prior research has failed to do.
• Locate your own research within the context of existing literature [very important!] . Collectively, your literature review should always place your case study within the larger domain of prior research about the problem. The overarching purpose of reviewing pertinent literature in a case study paper is to demonstrate that you have thoroughly identified and synthesized prior studies in relation to explaining the relevance of the case in addressing the research problem.

III.  Method

In this section, you explain why you selected a particular case [i.e., subject of analysis] and the strategy you used to identify and ultimately decide that your case was appropriate in addressing the research problem. The way you describe the methods used varies depending on the type of subject of analysis that constitutes your case study.

If your subject of analysis is an incident or event . In the social and behavioral sciences, the event or incident that represents the case to be studied is usually bounded by time and place, with a clear beginning and end and with an identifiable location or position relative to its surroundings. The subject of analysis can be a rare or critical event or it can focus on a typical or regular event. The purpose of studying a rare event is to illuminate new ways of thinking about the broader research problem or to test a hypothesis. Critical incident case studies must describe the method by which you identified the event and explain the process by which you determined the validity of this case to inform broader perspectives about the research problem or to reveal new findings. However, the event does not have to be a rare or uniquely significant to support new thinking about the research problem or to challenge an existing hypothesis. For example, Walo, Bull, and Breen conducted a case study to identify and evaluate the direct and indirect economic benefits and costs of a local sports event in the City of Lismore, New South Wales, Australia. The purpose of their study was to provide new insights from measuring the impact of a typical local sports event that prior studies could not measure well because they focused on large "mega-events." Whether the event is rare or not, the methods section should include an explanation of the following characteristics of the event: a) when did it take place; b) what were the underlying circumstances leading to the event; and, c) what were the consequences of the event in relation to the research problem.

If your subject of analysis is a person. Explain why you selected this particular individual to be studied and describe what experiences they have had that provide an opportunity to advance new understandings about the research problem. Mention any background about this person which might help the reader understand the significance of their experiences that make them worthy of study. This includes describing the relationships this person has had with other people, institutions, and/or events that support using them as the subject for a case study research paper. It is particularly important to differentiate the person as the subject of analysis from others and to succinctly explain how the person relates to examining the research problem [e.g., why is one politician in a particular local election used to show an increase in voter turnout from any other candidate running in the election]. Note that these issues apply to a specific group of people used as a case study unit of analysis [e.g., a classroom of students].

If your subject of analysis is a place. In general, a case study that investigates a place suggests a subject of analysis that is unique or special in some way and that this uniqueness can be used to build new understanding or knowledge about the research problem. A case study of a place must not only describe its various attributes relevant to the research problem [e.g., physical, social, historical, cultural, economic, political], but you must state the method by which you determined that this place will illuminate new understandings about the research problem. It is also important to articulate why a particular place as the case for study is being used if similar places also exist [i.e., if you are studying patterns of homeless encampments of veterans in open spaces, explain why you are studying Echo Park in Los Angeles rather than Griffith Park?]. If applicable, describe what type of human activity involving this place makes it a good choice to study [e.g., prior research suggests Echo Park has more homeless veterans].

If your subject of analysis is a phenomenon. A phenomenon refers to a fact, occurrence, or circumstance that can be studied or observed but with the cause or explanation to be in question. In this sense, a phenomenon that forms your subject of analysis can encompass anything that can be observed or presumed to exist but is not fully understood. In the social and behavioral sciences, the case usually focuses on human interaction within a complex physical, social, economic, cultural, or political system. For example, the phenomenon could be the observation that many vehicles used by ISIS fighters are small trucks with English language advertisements on them. The research problem could be that ISIS fighters are difficult to combat because they are highly mobile. The research questions could be how and by what means are these vehicles used by ISIS being supplied to the militants and how might supply lines to these vehicles be cut off? How might knowing the suppliers of these trucks reveal larger networks of collaborators and financial support? A case study of a phenomenon most often encompasses an in-depth analysis of a cause and effect that is grounded in an interactive relationship between people and their environment in some way.

NOTE:   The choice of the case or set of cases to study cannot appear random. Evidence that supports the method by which you identified and chose your subject of analysis should clearly support investigation of the research problem and linked to key findings from your literature review. Be sure to cite any studies that helped you determine that the case you chose was appropriate for examining the problem.

IV.  Discussion

The main elements of your discussion section are generally the same as any research paper, but centered around interpreting and drawing conclusions about the key findings from your analysis of the case study. Note that a general social sciences research paper may contain a separate section to report findings. However, in a paper designed around a case study, it is common to combine a description of the results with the discussion about their implications. The objectives of your discussion section should include the following:

Reiterate the Research Problem/State the Major Findings Briefly reiterate the research problem you are investigating and explain why the subject of analysis around which you designed the case study were used. You should then describe the findings revealed from your study of the case using direct, declarative, and succinct proclamation of the study results. Highlight any findings that were unexpected or especially profound.

Explain the Meaning of the Findings and Why They are Important Systematically explain the meaning of your case study findings and why you believe they are important. Begin this part of the section by repeating what you consider to be your most important or surprising finding first, then systematically review each finding. Be sure to thoroughly extrapolate what your analysis of the case can tell the reader about situations or conditions beyond the actual case that was studied while, at the same time, being careful not to misconstrue or conflate a finding that undermines the external validity of your conclusions.

Relate the Findings to Similar Studies No study in the social sciences is so novel or possesses such a restricted focus that it has absolutely no relation to previously published research. The discussion section should relate your case study results to those found in other studies, particularly if questions raised from prior studies served as the motivation for choosing your subject of analysis. This is important because comparing and contrasting the findings of other studies helps support the overall importance of your results and it highlights how and in what ways your case study design and the subject of analysis differs from prior research about the topic.

Consider Alternative Explanations of the Findings Remember that the purpose of social science research is to discover and not to prove. When writing the discussion section, you should carefully consider all possible explanations revealed by the case study results, rather than just those that fit your hypothesis or prior assumptions and biases. Be alert to what the in-depth analysis of the case may reveal about the research problem, including offering a contrarian perspective to what scholars have stated in prior research if that is how the findings can be interpreted from your case.

Acknowledge the Study's Limitations You can state the study's limitations in the conclusion section of your paper but describing the limitations of your subject of analysis in the discussion section provides an opportunity to identify the limitations and explain why they are not significant. This part of the discussion section should also note any unanswered questions or issues your case study could not address. More detailed information about how to document any limitations to your research can be found here .

Suggest Areas for Further Research Although your case study may offer important insights about the research problem, there are likely additional questions related to the problem that remain unanswered or findings that unexpectedly revealed themselves as a result of your in-depth analysis of the case. Be sure that the recommendations for further research are linked to the research problem and that you explain why your recommendations are valid in other contexts and based on the original assumptions of your study.

V.  Conclusion

As with any research paper, you should summarize your conclusion in clear, simple language; emphasize how the findings from your case study differs from or supports prior research and why. Do not simply reiterate the discussion section. Provide a synthesis of key findings presented in the paper to show how these converge to address the research problem. If you haven't already done so in the discussion section, be sure to document the limitations of your case study and any need for further research.

The function of your paper's conclusion is to: 1) reiterate the main argument supported by the findings from your case study; 2) state clearly the context, background, and necessity of pursuing the research problem using a case study design in relation to an issue, controversy, or a gap found from reviewing the literature; and, 3) provide a place to persuasively and succinctly restate the significance of your research problem, given that the reader has now been presented with in-depth information about the topic.

Consider the following points to help ensure your conclusion is appropriate:

• If the argument or purpose of your paper is complex, you may need to summarize these points for your reader.
• If prior to your conclusion, you have not yet explained the significance of your findings or if you are proceeding inductively, use the conclusion of your paper to describe your main points and explain their significance.
• Move from a detailed to a general level of consideration of the case study's findings that returns the topic to the context provided by the introduction or within a new context that emerges from your case study findings.

Note that, depending on the discipline you are writing in or the preferences of your professor, the concluding paragraph may contain your final reflections on the evidence presented as it applies to practice or on the essay's central research problem. However, the nature of being introspective about the subject of analysis you have investigated will depend on whether you are explicitly asked to express your observations in this way.

Problems to Avoid

Overgeneralization One of the goals of a case study is to lay a foundation for understanding broader trends and issues applied to similar circumstances. However, be careful when drawing conclusions from your case study. They must be evidence-based and grounded in the results of the study; otherwise, it is merely speculation. Looking at a prior example, it would be incorrect to state that a factor in improving girls access to education in Azerbaijan and the policy implications this may have for improving access in other Muslim nations is due to girls access to social media if there is no documentary evidence from your case study to indicate this. There may be anecdotal evidence that retention rates were better for girls who were engaged with social media, but this observation would only point to the need for further research and would not be a definitive finding if this was not a part of your original research agenda.

Failure to Document Limitations No case is going to reveal all that needs to be understood about a research problem. Therefore, just as you have to clearly state the limitations of a general research study , you must describe the specific limitations inherent in the subject of analysis. For example, the case of studying how women conceptualize the need for water conservation in a village in Uganda could have limited application in other cultural contexts or in areas where fresh water from rivers or lakes is plentiful and, therefore, conservation is understood more in terms of managing access rather than preserving access to a scarce resource.

Failure to Extrapolate All Possible Implications Just as you don't want to over-generalize from your case study findings, you also have to be thorough in the consideration of all possible outcomes or recommendations derived from your findings. If you do not, your reader may question the validity of your analysis, particularly if you failed to document an obvious outcome from your case study research. For example, in the case of studying the accident at the railroad crossing to evaluate where and what types of warning signals should be located, you failed to take into consideration speed limit signage as well as warning signals. When designing your case study, be sure you have thoroughly addressed all aspects of the problem and do not leave gaps in your analysis that leave the reader questioning the results.

Case Studies. Writing@CSU. Colorado State University; Gerring, John. Case Study Research: Principles and Practices . New York: Cambridge University Press, 2007; Merriam, Sharan B. Qualitative Research and Case Study Applications in Education . Rev. ed. San Francisco, CA: Jossey-Bass, 1998; Miller, Lisa L. “The Use of Case Studies in Law and Social Science Research.” Annual Review of Law and Social Science 14 (2018): TBD; Mills, Albert J., Gabrielle Durepos, and Eiden Wiebe, editors. Encyclopedia of Case Study Research . Thousand Oaks, CA: SAGE Publications, 2010; Putney, LeAnn Grogan. "Case Study." In Encyclopedia of Research Design , Neil J. Salkind, editor. (Thousand Oaks, CA: SAGE Publications, 2010), pp. 116-120; Simons, Helen. Case Study Research in Practice . London: SAGE Publications, 2009;  Kratochwill,  Thomas R. and Joel R. Levin, editors. Single-Case Research Design and Analysis: New Development for Psychology and Education .  Hilldsale, NJ: Lawrence Erlbaum Associates, 1992; Swanborn, Peter G. Case Study Research: What, Why and How? London : SAGE, 2010; Yin, Robert K. Case Study Research: Design and Methods . 6th edition. Los Angeles, CA, SAGE Publications, 2014; Walo, Maree, Adrian Bull, and Helen Breen. “Achieving Economic Benefits at Local Events: A Case Study of a Local Sports Event.” Festival Management and Event Tourism 4 (1996): 95-106.

Writing Tip

At Least Five Misconceptions about Case Study Research

Social science case studies are often perceived as limited in their ability to create new knowledge because they are not randomly selected and findings cannot be generalized to larger populations. Flyvbjerg examines five misunderstandings about case study research and systematically "corrects" each one. To quote, these are:

Misunderstanding 1 :  General, theoretical [context-independent] knowledge is more valuable than concrete, practical [context-dependent] knowledge. Misunderstanding 2 :  One cannot generalize on the basis of an individual case; therefore, the case study cannot contribute to scientific development. Misunderstanding 3 :  The case study is most useful for generating hypotheses; that is, in the first stage of a total research process, whereas other methods are more suitable for hypotheses testing and theory building. Misunderstanding 4 :  The case study contains a bias toward verification, that is, a tendency to confirm the researcher’s preconceived notions. Misunderstanding 5 :  It is often difficult to summarize and develop general propositions and theories on the basis of specific case studies [p. 221].

While writing your paper, think introspectively about how you addressed these misconceptions because to do so can help you strengthen the validity and reliability of your research by clarifying issues of case selection, the testing and challenging of existing assumptions, the interpretation of key findings, and the summation of case outcomes. Think of a case study research paper as a complete, in-depth narrative about the specific properties and key characteristics of your subject of analysis applied to the research problem.

Flyvbjerg, Bent. “Five Misunderstandings About Case-Study Research.” Qualitative Inquiry 12 (April 2006): 219-245.

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The Ultimate Guide to Qualitative Research - Part 1: The Basics

• Introduction and overview
• What is qualitative research?
• What is qualitative data?
• Examples of qualitative data
• Qualitative vs. quantitative research
• Mixed methods
• Qualitative research preparation
• Theoretical perspective
• Theoretical framework
• Literature reviews

Research question

• Conceptual framework
• Conceptual vs. theoretical framework

Data collection

• Qualitative research methods
• Focus groups
• Observational research

What is a case study?

Applications for case study research, what is a good case study, process of case study design, benefits and limitations of case studies.

• Ethnographical research
• Ethical considerations
• Confidentiality and privacy
• Power dynamics
• Reflexivity

Case studies

Case studies are essential to qualitative research , offering a lens through which researchers can investigate complex phenomena within their real-life contexts. This chapter explores the concept, purpose, applications, examples, and types of case studies and provides guidance on how to conduct case study research effectively.

Whereas quantitative methods look at phenomena at scale, case study research looks at a concept or phenomenon in considerable detail. While analyzing a single case can help understand one perspective regarding the object of research inquiry, analyzing multiple cases can help obtain a more holistic sense of the topic or issue. Let's provide a basic definition of a case study, then explore its characteristics and role in the qualitative research process.

Definition of a case study

A case study in qualitative research is a strategy of inquiry that involves an in-depth investigation of a phenomenon within its real-world context. It provides researchers with the opportunity to acquire an in-depth understanding of intricate details that might not be as apparent or accessible through other methods of research. The specific case or cases being studied can be a single person, group, or organization – demarcating what constitutes a relevant case worth studying depends on the researcher and their research question .

Among qualitative research methods , a case study relies on multiple sources of evidence, such as documents, artifacts, interviews , or observations , to present a complete and nuanced understanding of the phenomenon under investigation. The objective is to illuminate the readers' understanding of the phenomenon beyond its abstract statistical or theoretical explanations.

Characteristics of case studies

Case studies typically possess a number of distinct characteristics that set them apart from other research methods. These characteristics include a focus on holistic description and explanation, flexibility in the design and data collection methods, reliance on multiple sources of evidence, and emphasis on the context in which the phenomenon occurs.

Furthermore, case studies can often involve a longitudinal examination of the case, meaning they study the case over a period of time. These characteristics allow case studies to yield comprehensive, in-depth, and richly contextualized insights about the phenomenon of interest.

The role of case studies in research

Case studies hold a unique position in the broader landscape of research methods aimed at theory development. They are instrumental when the primary research interest is to gain an intensive, detailed understanding of a phenomenon in its real-life context.

In addition, case studies can serve different purposes within research - they can be used for exploratory, descriptive, or explanatory purposes, depending on the research question and objectives. This flexibility and depth make case studies a valuable tool in the toolkit of qualitative researchers.

Remember, a well-conducted case study can offer a rich, insightful contribution to both academic and practical knowledge through theory development or theory verification, thus enhancing our understanding of complex phenomena in their real-world contexts.

What is the purpose of a case study?

Case study research aims for a more comprehensive understanding of phenomena, requiring various research methods to gather information for qualitative analysis . Ultimately, a case study can allow the researcher to gain insight into a particular object of inquiry and develop a theoretical framework relevant to the research inquiry.

Why use case studies in qualitative research?

Using case studies as a research strategy depends mainly on the nature of the research question and the researcher's access to the data.

Conducting case study research provides a level of detail and contextual richness that other research methods might not offer. They are beneficial when there's a need to understand complex social phenomena within their natural contexts.

The explanatory, exploratory, and descriptive roles of case studies

Case studies can take on various roles depending on the research objectives. They can be exploratory when the research aims to discover new phenomena or define new research questions; they are descriptive when the objective is to depict a phenomenon within its context in a detailed manner; and they can be explanatory if the goal is to understand specific relationships within the studied context. Thus, the versatility of case studies allows researchers to approach their topic from different angles, offering multiple ways to uncover and interpret the data .

The impact of case studies on knowledge development

Case studies play a significant role in knowledge development across various disciplines. Analysis of cases provides an avenue for researchers to explore phenomena within their context based on the collected data.

This can result in the production of rich, practical insights that can be instrumental in both theory-building and practice. Case studies allow researchers to delve into the intricacies and complexities of real-life situations, uncovering insights that might otherwise remain hidden.

Types of case studies

In qualitative research , a case study is not a one-size-fits-all approach. Depending on the nature of the research question and the specific objectives of the study, researchers might choose to use different types of case studies. These types differ in their focus, methodology, and the level of detail they provide about the phenomenon under investigation.

Understanding these types is crucial for selecting the most appropriate approach for your research project and effectively achieving your research goals. Let's briefly look at the main types of case studies.

Exploratory case studies

Exploratory case studies are typically conducted to develop a theory or framework around an understudied phenomenon. They can also serve as a precursor to a larger-scale research project. Exploratory case studies are useful when a researcher wants to identify the key issues or questions which can spur more extensive study or be used to develop propositions for further research. These case studies are characterized by flexibility, allowing researchers to explore various aspects of a phenomenon as they emerge, which can also form the foundation for subsequent studies.

Descriptive case studies

Descriptive case studies aim to provide a complete and accurate representation of a phenomenon or event within its context. These case studies are often based on an established theoretical framework, which guides how data is collected and analyzed. The researcher is concerned with describing the phenomenon in detail, as it occurs naturally, without trying to influence or manipulate it.

Explanatory case studies

Explanatory case studies are focused on explanation - they seek to clarify how or why certain phenomena occur. Often used in complex, real-life situations, they can be particularly valuable in clarifying causal relationships among concepts and understanding the interplay between different factors within a specific context.

Intrinsic, instrumental, and collective case studies

These three categories of case studies focus on the nature and purpose of the study. An intrinsic case study is conducted when a researcher has an inherent interest in the case itself. Instrumental case studies are employed when the case is used to provide insight into a particular issue or phenomenon. A collective case study, on the other hand, involves studying multiple cases simultaneously to investigate some general phenomena.

Each type of case study serves a different purpose and has its own strengths and challenges. The selection of the type should be guided by the research question and objectives, as well as the context and constraints of the research.

The flexibility, depth, and contextual richness offered by case studies make this approach an excellent research method for various fields of study. They enable researchers to investigate real-world phenomena within their specific contexts, capturing nuances that other research methods might miss. Across numerous fields, case studies provide valuable insights into complex issues.

Critical information systems research

Case studies provide a detailed understanding of the role and impact of information systems in different contexts. They offer a platform to explore how information systems are designed, implemented, and used and how they interact with various social, economic, and political factors. Case studies in this field often focus on examining the intricate relationship between technology, organizational processes, and user behavior, helping to uncover insights that can inform better system design and implementation.

Health research

Health research is another field where case studies are highly valuable. They offer a way to explore patient experiences, healthcare delivery processes, and the impact of various interventions in a real-world context.

Case studies can provide a deep understanding of a patient's journey, giving insights into the intricacies of disease progression, treatment effects, and the psychosocial aspects of health and illness.

Asthma research studies

Specifically within medical research, studies on asthma often employ case studies to explore the individual and environmental factors that influence asthma development, management, and outcomes. A case study can provide rich, detailed data about individual patients' experiences, from the triggers and symptoms they experience to the effectiveness of various management strategies. This can be crucial for developing patient-centered asthma care approaches.

Other fields

Apart from the fields mentioned, case studies are also extensively used in business and management research, education research, and political sciences, among many others. They provide an opportunity to delve into the intricacies of real-world situations, allowing for a comprehensive understanding of various phenomena.

Case studies, with their depth and contextual focus, offer unique insights across these varied fields. They allow researchers to illuminate the complexities of real-life situations, contributing to both theory and practice.

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Understanding the key elements of case study design is crucial for conducting rigorous and impactful case study research. A well-structured design guides the researcher through the process, ensuring that the study is methodologically sound and its findings are reliable and valid. The main elements of case study design include the research question , propositions, units of analysis, and the logic linking the data to the propositions.

The research question is the foundation of any research study. A good research question guides the direction of the study and informs the selection of the case, the methods of collecting data, and the analysis techniques. A well-formulated research question in case study research is typically clear, focused, and complex enough to merit further detailed examination of the relevant case(s).

Propositions

Propositions, though not necessary in every case study, provide a direction by stating what we might expect to find in the data collected. They guide how data is collected and analyzed by helping researchers focus on specific aspects of the case. They are particularly important in explanatory case studies, which seek to understand the relationships among concepts within the studied phenomenon.

Units of analysis

The unit of analysis refers to the case, or the main entity or entities that are being analyzed in the study. In case study research, the unit of analysis can be an individual, a group, an organization, a decision, an event, or even a time period. It's crucial to clearly define the unit of analysis, as it shapes the qualitative data analysis process by allowing the researcher to analyze a particular case and synthesize analysis across multiple case studies to draw conclusions.

Argumentation

This refers to the inferential model that allows researchers to draw conclusions from the data. The researcher needs to ensure that there is a clear link between the data, the propositions (if any), and the conclusions drawn. This argumentation is what enables the researcher to make valid and credible inferences about the phenomenon under study.

Understanding and carefully considering these elements in the design phase of a case study can significantly enhance the quality of the research. It can help ensure that the study is methodologically sound and its findings contribute meaningful insights about the case.

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Conducting a case study involves several steps, from defining the research question and selecting the case to collecting and analyzing data . This section outlines these key stages, providing a practical guide on how to conduct case study research.

Defining the research question

The first step in case study research is defining a clear, focused research question. This question should guide the entire research process, from case selection to analysis. It's crucial to ensure that the research question is suitable for a case study approach. Typically, such questions are exploratory or descriptive in nature and focus on understanding a phenomenon within its real-life context.

Selecting and defining the case

The selection of the case should be based on the research question and the objectives of the study. It involves choosing a unique example or a set of examples that provide rich, in-depth data about the phenomenon under investigation. After selecting the case, it's crucial to define it clearly, setting the boundaries of the case, including the time period and the specific context.

Previous research can help guide the case study design. When considering a case study, an example of a case could be taken from previous case study research and used to define cases in a new research inquiry. Considering recently published examples can help understand how to select and define cases effectively.

Developing a detailed case study protocol

A case study protocol outlines the procedures and general rules to be followed during the case study. This includes the data collection methods to be used, the sources of data, and the procedures for analysis. Having a detailed case study protocol ensures consistency and reliability in the study.

The protocol should also consider how to work with the people involved in the research context to grant the research team access to collecting data. As mentioned in previous sections of this guide, establishing rapport is an essential component of qualitative research as it shapes the overall potential for collecting and analyzing data.

Collecting data

Gathering data in case study research often involves multiple sources of evidence, including documents, archival records, interviews, observations, and physical artifacts. This allows for a comprehensive understanding of the case. The process for gathering data should be systematic and carefully documented to ensure the reliability and validity of the study.

Analyzing and interpreting data

The next step is analyzing the data. This involves organizing the data , categorizing it into themes or patterns , and interpreting these patterns to answer the research question. The analysis might also involve comparing the findings with prior research or theoretical propositions.

Writing the case study report

The final step is writing the case study report . This should provide a detailed description of the case, the data, the analysis process, and the findings. The report should be clear, organized, and carefully written to ensure that the reader can understand the case and the conclusions drawn from it.

Each of these steps is crucial in ensuring that the case study research is rigorous, reliable, and provides valuable insights about the case.

The type, depth, and quality of data in your study can significantly influence the validity and utility of the study. In case study research, data is usually collected from multiple sources to provide a comprehensive and nuanced understanding of the case. This section will outline the various methods of collecting data used in case study research and discuss considerations for ensuring the quality of the data.

Interviews are a common method of gathering data in case study research. They can provide rich, in-depth data about the perspectives, experiences, and interpretations of the individuals involved in the case. Interviews can be structured , semi-structured , or unstructured , depending on the research question and the degree of flexibility needed.

Observations

Observations involve the researcher observing the case in its natural setting, providing first-hand information about the case and its context. Observations can provide data that might not be revealed in interviews or documents, such as non-verbal cues or contextual information.

Documents and artifacts

Documents and archival records provide a valuable source of data in case study research. They can include reports, letters, memos, meeting minutes, email correspondence, and various public and private documents related to the case.

These records can provide historical context, corroborate evidence from other sources, and offer insights into the case that might not be apparent from interviews or observations.

Physical artifacts refer to any physical evidence related to the case, such as tools, products, or physical environments. These artifacts can provide tangible insights into the case, complementing the data gathered from other sources.

Ensuring the quality of data collection

Determining the quality of data in case study research requires careful planning and execution. It's crucial to ensure that the data is reliable, accurate, and relevant to the research question. This involves selecting appropriate methods of collecting data, properly training interviewers or observers, and systematically recording and storing the data. It also includes considering ethical issues related to collecting and handling data, such as obtaining informed consent and ensuring the privacy and confidentiality of the participants.

Data analysis

Analyzing case study research involves making sense of the rich, detailed data to answer the research question. This process can be challenging due to the volume and complexity of case study data. However, a systematic and rigorous approach to analysis can ensure that the findings are credible and meaningful. This section outlines the main steps and considerations in analyzing data in case study research.

Organizing the data

The first step in the analysis is organizing the data. This involves sorting the data into manageable sections, often according to the data source or the theme. This step can also involve transcribing interviews, digitizing physical artifacts, or organizing observational data.

Categorizing and coding the data

Once the data is organized, the next step is to categorize or code the data. This involves identifying common themes, patterns, or concepts in the data and assigning codes to relevant data segments. Coding can be done manually or with the help of software tools, and in either case, qualitative analysis software can greatly facilitate the entire coding process. Coding helps to reduce the data to a set of themes or categories that can be more easily analyzed.

Identifying patterns and themes

After coding the data, the researcher looks for patterns or themes in the coded data. This involves comparing and contrasting the codes and looking for relationships or patterns among them. The identified patterns and themes should help answer the research question.

Interpreting the data

Once patterns and themes have been identified, the next step is to interpret these findings. This involves explaining what the patterns or themes mean in the context of the research question and the case. This interpretation should be grounded in the data, but it can also involve drawing on theoretical concepts or prior research.

Verification of the data

The last step in the analysis is verification. This involves checking the accuracy and consistency of the analysis process and confirming that the findings are supported by the data. This can involve re-checking the original data, checking the consistency of codes, or seeking feedback from research participants or peers.

Like any research method , case study research has its strengths and limitations. Researchers must be aware of these, as they can influence the design, conduct, and interpretation of the study.

Understanding the strengths and limitations of case study research can also guide researchers in deciding whether this approach is suitable for their research question . This section outlines some of the key strengths and limitations of case study research.

Benefits include the following:

• Rich, detailed data: One of the main strengths of case study research is that it can generate rich, detailed data about the case. This can provide a deep understanding of the case and its context, which can be valuable in exploring complex phenomena.
• Flexibility: Case study research is flexible in terms of design , data collection , and analysis . A sufficient degree of flexibility allows the researcher to adapt the study according to the case and the emerging findings.
• Real-world context: Case study research involves studying the case in its real-world context, which can provide valuable insights into the interplay between the case and its context.
• Multiple sources of evidence: Case study research often involves collecting data from multiple sources , which can enhance the robustness and validity of the findings.

On the other hand, researchers should consider the following limitations:

• Generalizability: A common criticism of case study research is that its findings might not be generalizable to other cases due to the specificity and uniqueness of each case.
• Time and resource intensive: Case study research can be time and resource intensive due to the depth of the investigation and the amount of collected data.
• Complexity of analysis: The rich, detailed data generated in case study research can make analyzing the data challenging.
• Subjectivity: Given the nature of case study research, there may be a higher degree of subjectivity in interpreting the data , so researchers need to reflect on this and transparently convey to audiences how the research was conducted.

Being aware of these strengths and limitations can help researchers design and conduct case study research effectively and interpret and report the findings appropriately.

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Case Study – Methods, Examples and Guide

Table of Contents

A case study is a research method that involves an in-depth examination and analysis of a particular phenomenon or case, such as an individual, organization, community, event, or situation.

It is a qualitative research approach that aims to provide a detailed and comprehensive understanding of the case being studied. Case studies typically involve multiple sources of data, including interviews, observations, documents, and artifacts, which are analyzed using various techniques, such as content analysis, thematic analysis, and grounded theory. The findings of a case study are often used to develop theories, inform policy or practice, or generate new research questions.

Types of Case Study

Types and Methods of Case Study are as follows:

Single-Case Study

A single-case study is an in-depth analysis of a single case. This type of case study is useful when the researcher wants to understand a specific phenomenon in detail.

For Example , A researcher might conduct a single-case study on a particular individual to understand their experiences with a particular health condition or a specific organization to explore their management practices. The researcher collects data from multiple sources, such as interviews, observations, and documents, and uses various techniques to analyze the data, such as content analysis or thematic analysis. The findings of a single-case study are often used to generate new research questions, develop theories, or inform policy or practice.

Multiple-Case Study

A multiple-case study involves the analysis of several cases that are similar in nature. This type of case study is useful when the researcher wants to identify similarities and differences between the cases.

For Example, a researcher might conduct a multiple-case study on several companies to explore the factors that contribute to their success or failure. The researcher collects data from each case, compares and contrasts the findings, and uses various techniques to analyze the data, such as comparative analysis or pattern-matching. The findings of a multiple-case study can be used to develop theories, inform policy or practice, or generate new research questions.

Exploratory Case Study

An exploratory case study is used to explore a new or understudied phenomenon. This type of case study is useful when the researcher wants to generate hypotheses or theories about the phenomenon.

For Example, a researcher might conduct an exploratory case study on a new technology to understand its potential impact on society. The researcher collects data from multiple sources, such as interviews, observations, and documents, and uses various techniques to analyze the data, such as grounded theory or content analysis. The findings of an exploratory case study can be used to generate new research questions, develop theories, or inform policy or practice.

Descriptive Case Study

A descriptive case study is used to describe a particular phenomenon in detail. This type of case study is useful when the researcher wants to provide a comprehensive account of the phenomenon.

For Example, a researcher might conduct a descriptive case study on a particular community to understand its social and economic characteristics. The researcher collects data from multiple sources, such as interviews, observations, and documents, and uses various techniques to analyze the data, such as content analysis or thematic analysis. The findings of a descriptive case study can be used to inform policy or practice or generate new research questions.

Instrumental Case Study

An instrumental case study is used to understand a particular phenomenon that is instrumental in achieving a particular goal. This type of case study is useful when the researcher wants to understand the role of the phenomenon in achieving the goal.

For Example, a researcher might conduct an instrumental case study on a particular policy to understand its impact on achieving a particular goal, such as reducing poverty. The researcher collects data from multiple sources, such as interviews, observations, and documents, and uses various techniques to analyze the data, such as content analysis or thematic analysis. The findings of an instrumental case study can be used to inform policy or practice or generate new research questions.

Case Study Data Collection Methods

Here are some common data collection methods for case studies:

Interviews involve asking questions to individuals who have knowledge or experience relevant to the case study. Interviews can be structured (where the same questions are asked to all participants) or unstructured (where the interviewer follows up on the responses with further questions). Interviews can be conducted in person, over the phone, or through video conferencing.

Observations

Observations involve watching and recording the behavior and activities of individuals or groups relevant to the case study. Observations can be participant (where the researcher actively participates in the activities) or non-participant (where the researcher observes from a distance). Observations can be recorded using notes, audio or video recordings, or photographs.

Documents can be used as a source of information for case studies. Documents can include reports, memos, emails, letters, and other written materials related to the case study. Documents can be collected from the case study participants or from public sources.

Surveys involve asking a set of questions to a sample of individuals relevant to the case study. Surveys can be administered in person, over the phone, through mail or email, or online. Surveys can be used to gather information on attitudes, opinions, or behaviors related to the case study.

Artifacts are physical objects relevant to the case study. Artifacts can include tools, equipment, products, or other objects that provide insights into the case study phenomenon.

How to conduct Case Study Research

Conducting a case study research involves several steps that need to be followed to ensure the quality and rigor of the study. Here are the steps to conduct case study research:

• Define the research questions: The first step in conducting a case study research is to define the research questions. The research questions should be specific, measurable, and relevant to the case study phenomenon under investigation.
• Select the case: The next step is to select the case or cases to be studied. The case should be relevant to the research questions and should provide rich and diverse data that can be used to answer the research questions.
• Collect data: Data can be collected using various methods, such as interviews, observations, documents, surveys, and artifacts. The data collection method should be selected based on the research questions and the nature of the case study phenomenon.
• Analyze the data: The data collected from the case study should be analyzed using various techniques, such as content analysis, thematic analysis, or grounded theory. The analysis should be guided by the research questions and should aim to provide insights and conclusions relevant to the research questions.
• Draw conclusions: The conclusions drawn from the case study should be based on the data analysis and should be relevant to the research questions. The conclusions should be supported by evidence and should be clearly stated.
• Validate the findings: The findings of the case study should be validated by reviewing the data and the analysis with participants or other experts in the field. This helps to ensure the validity and reliability of the findings.
• Write the report: The final step is to write the report of the case study research. The report should provide a clear description of the case study phenomenon, the research questions, the data collection methods, the data analysis, the findings, and the conclusions. The report should be written in a clear and concise manner and should follow the guidelines for academic writing.

Examples of Case Study

Here are some examples of case study research:

• The Hawthorne Studies : Conducted between 1924 and 1932, the Hawthorne Studies were a series of case studies conducted by Elton Mayo and his colleagues to examine the impact of work environment on employee productivity. The studies were conducted at the Hawthorne Works plant of the Western Electric Company in Chicago and included interviews, observations, and experiments.
• The Stanford Prison Experiment: Conducted in 1971, the Stanford Prison Experiment was a case study conducted by Philip Zimbardo to examine the psychological effects of power and authority. The study involved simulating a prison environment and assigning participants to the role of guards or prisoners. The study was controversial due to the ethical issues it raised.
• The Challenger Disaster: The Challenger Disaster was a case study conducted to examine the causes of the Space Shuttle Challenger explosion in 1986. The study included interviews, observations, and analysis of data to identify the technical, organizational, and cultural factors that contributed to the disaster.
• The Enron Scandal: The Enron Scandal was a case study conducted to examine the causes of the Enron Corporation’s bankruptcy in 2001. The study included interviews, analysis of financial data, and review of documents to identify the accounting practices, corporate culture, and ethical issues that led to the company’s downfall.
• The Fukushima Nuclear Disaster : The Fukushima Nuclear Disaster was a case study conducted to examine the causes of the nuclear accident that occurred at the Fukushima Daiichi Nuclear Power Plant in Japan in 2011. The study included interviews, analysis of data, and review of documents to identify the technical, organizational, and cultural factors that contributed to the disaster.

Application of Case Study

Case studies have a wide range of applications across various fields and industries. Here are some examples:

Business and Management

Case studies are widely used in business and management to examine real-life situations and develop problem-solving skills. Case studies can help students and professionals to develop a deep understanding of business concepts, theories, and best practices.

Case studies are used in healthcare to examine patient care, treatment options, and outcomes. Case studies can help healthcare professionals to develop critical thinking skills, diagnose complex medical conditions, and develop effective treatment plans.

Case studies are used in education to examine teaching and learning practices. Case studies can help educators to develop effective teaching strategies, evaluate student progress, and identify areas for improvement.

Social Sciences

Case studies are widely used in social sciences to examine human behavior, social phenomena, and cultural practices. Case studies can help researchers to develop theories, test hypotheses, and gain insights into complex social issues.

Law and Ethics

Case studies are used in law and ethics to examine legal and ethical dilemmas. Case studies can help lawyers, policymakers, and ethical professionals to develop critical thinking skills, analyze complex cases, and make informed decisions.

Purpose of Case Study

The purpose of a case study is to provide a detailed analysis of a specific phenomenon, issue, or problem in its real-life context. A case study is a qualitative research method that involves the in-depth exploration and analysis of a particular case, which can be an individual, group, organization, event, or community.

The primary purpose of a case study is to generate a comprehensive and nuanced understanding of the case, including its history, context, and dynamics. Case studies can help researchers to identify and examine the underlying factors, processes, and mechanisms that contribute to the case and its outcomes. This can help to develop a more accurate and detailed understanding of the case, which can inform future research, practice, or policy.

Case studies can also serve other purposes, including:

• Illustrating a theory or concept: Case studies can be used to illustrate and explain theoretical concepts and frameworks, providing concrete examples of how they can be applied in real-life situations.
• Developing hypotheses: Case studies can help to generate hypotheses about the causal relationships between different factors and outcomes, which can be tested through further research.
• Providing insight into complex issues: Case studies can provide insights into complex and multifaceted issues, which may be difficult to understand through other research methods.
• Informing practice or policy: Case studies can be used to inform practice or policy by identifying best practices, lessons learned, or areas for improvement.

Advantages of Case Study Research

There are several advantages of case study research, including:

• In-depth exploration: Case study research allows for a detailed exploration and analysis of a specific phenomenon, issue, or problem in its real-life context. This can provide a comprehensive understanding of the case and its dynamics, which may not be possible through other research methods.
• Rich data: Case study research can generate rich and detailed data, including qualitative data such as interviews, observations, and documents. This can provide a nuanced understanding of the case and its complexity.
• Holistic perspective: Case study research allows for a holistic perspective of the case, taking into account the various factors, processes, and mechanisms that contribute to the case and its outcomes. This can help to develop a more accurate and comprehensive understanding of the case.
• Theory development: Case study research can help to develop and refine theories and concepts by providing empirical evidence and concrete examples of how they can be applied in real-life situations.
• Practical application: Case study research can inform practice or policy by identifying best practices, lessons learned, or areas for improvement.
• Contextualization: Case study research takes into account the specific context in which the case is situated, which can help to understand how the case is influenced by the social, cultural, and historical factors of its environment.

Limitations of Case Study Research

There are several limitations of case study research, including:

• Limited generalizability : Case studies are typically focused on a single case or a small number of cases, which limits the generalizability of the findings. The unique characteristics of the case may not be applicable to other contexts or populations, which may limit the external validity of the research.
• Biased sampling: Case studies may rely on purposive or convenience sampling, which can introduce bias into the sample selection process. This may limit the representativeness of the sample and the generalizability of the findings.
• Subjectivity: Case studies rely on the interpretation of the researcher, which can introduce subjectivity into the analysis. The researcher’s own biases, assumptions, and perspectives may influence the findings, which may limit the objectivity of the research.
• Limited control: Case studies are typically conducted in naturalistic settings, which limits the control that the researcher has over the environment and the variables being studied. This may limit the ability to establish causal relationships between variables.
• Time-consuming: Case studies can be time-consuming to conduct, as they typically involve a detailed exploration and analysis of a specific case. This may limit the feasibility of conducting multiple case studies or conducting case studies in a timely manner.
• Resource-intensive: Case studies may require significant resources, including time, funding, and expertise. This may limit the ability of researchers to conduct case studies in resource-constrained settings.

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• Case Study | Definition, Examples & Methods

Case Study | Definition, Examples & Methods

Published on 5 May 2022 by Shona McCombes . Revised on 30 January 2023.

A case study is a detailed study of a specific subject, such as a person, group, place, event, organisation, or phenomenon. Case studies are commonly used in social, educational, clinical, and business research.

A case study research design usually involves qualitative methods , but quantitative methods are sometimes also used. Case studies are good for describing , comparing, evaluating, and understanding different aspects of a research problem .

Table of contents

When to do a case study, step 1: select a case, step 2: build a theoretical framework, step 3: collect your data, step 4: describe and analyse the case.

A case study is an appropriate research design when you want to gain concrete, contextual, in-depth knowledge about a specific real-world subject. It allows you to explore the key characteristics, meanings, and implications of the case.

Case studies are often a good choice in a thesis or dissertation . They keep your project focused and manageable when you don’t have the time or resources to do large-scale research.

You might use just one complex case study where you explore a single subject in depth, or conduct multiple case studies to compare and illuminate different aspects of your research problem.

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Once you have developed your problem statement and research questions , you should be ready to choose the specific case that you want to focus on. A good case study should have the potential to:

• Provide new or unexpected insights into the subject
• Challenge or complicate existing assumptions and theories
• Propose practical courses of action to resolve a problem
• Open up new directions for future research

Unlike quantitative or experimental research, a strong case study does not require a random or representative sample. In fact, case studies often deliberately focus on unusual, neglected, or outlying cases which may shed new light on the research problem.

If you find yourself aiming to simultaneously investigate and solve an issue, consider conducting action research . As its name suggests, action research conducts research and takes action at the same time, and is highly iterative and flexible. 

However, you can also choose a more common or representative case to exemplify a particular category, experience, or phenomenon.

While case studies focus more on concrete details than general theories, they should usually have some connection with theory in the field. This way the case study is not just an isolated description, but is integrated into existing knowledge about the topic. It might aim to:

• Exemplify a theory by showing how it explains the case under investigation
• Expand on a theory by uncovering new concepts and ideas that need to be incorporated
• Challenge a theory by exploring an outlier case that doesn’t fit with established assumptions

To ensure that your analysis of the case has a solid academic grounding, you should conduct a literature review of sources related to the topic and develop a theoretical framework . This means identifying key concepts and theories to guide your analysis and interpretation.

There are many different research methods you can use to collect data on your subject. Case studies tend to focus on qualitative data using methods such as interviews, observations, and analysis of primary and secondary sources (e.g., newspaper articles, photographs, official records). Sometimes a case study will also collect quantitative data .

The aim is to gain as thorough an understanding as possible of the case and its context.

In writing up the case study, you need to bring together all the relevant aspects to give as complete a picture as possible of the subject.

How you report your findings depends on the type of research you are doing. Some case studies are structured like a standard scientific paper or thesis, with separate sections or chapters for the methods , results , and discussion .

Others are written in a more narrative style, aiming to explore the case from various angles and analyse its meanings and implications (for example, by using textual analysis or discourse analysis ).

In all cases, though, make sure to give contextual details about the case, connect it back to the literature and theory, and discuss how it fits into wider patterns or debates.

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Designing and Conducting Case Studies

This guide examines case studies, a form of qualitative descriptive research that is used to look at individuals, a small group of participants, or a group as a whole. Researchers collect data about participants using participant and direct observations, interviews, protocols, tests, examinations of records, and collections of writing samples. Starting with a definition of the case study, the guide moves to a brief history of this research method. Using several well documented case studies, the guide then looks at applications and methods including data collection and analysis. A discussion of ways to handle validity, reliability, and generalizability follows, with special attention to case studies as they are applied to composition studies. Finally, this guide examines the strengths and weaknesses of case studies.

Definition and Overview

Case study refers to the collection and presentation of detailed information about a particular participant or small group, frequently including the accounts of subjects themselves. A form of qualitative descriptive research, the case study looks intensely at an individual or small participant pool, drawing conclusions only about that participant or group and only in that specific context. Researchers do not focus on the discovery of a universal, generalizable truth, nor do they typically look for cause-effect relationships; instead, emphasis is placed on exploration and description.

Case studies typically examine the interplay of all variables in order to provide as complete an understanding of an event or situation as possible. This type of comprehensive understanding is arrived at through a process known as thick description, which involves an in-depth description of the entity being evaluated, the circumstances under which it is used, the characteristics of the people involved in it, and the nature of the community in which it is located. Thick description also involves interpreting the meaning of demographic and descriptive data such as cultural norms and mores, community values, ingrained attitudes, and motives.

Unlike quantitative methods of research, like the survey, which focus on the questions of who, what, where, how much, and how many, and archival analysis, which often situates the participant in some form of historical context, case studies are the preferred strategy when how or why questions are asked. Likewise, they are the preferred method when the researcher has little control over the events, and when there is a contemporary focus within a real life context. In addition, unlike more specifically directed experiments, case studies require a problem that seeks a holistic understanding of the event or situation in question using inductive logic--reasoning from specific to more general terms.

In scholarly circles, case studies are frequently discussed within the context of qualitative research and naturalistic inquiry. Case studies are often referred to interchangeably with ethnography, field study, and participant observation. The underlying philosophical assumptions in the case are similar to these types of qualitative research because each takes place in a natural setting (such as a classroom, neighborhood, or private home), and strives for a more holistic interpretation of the event or situation under study.

Unlike more statistically-based studies which search for quantifiable data, the goal of a case study is to offer new variables and questions for further research. F.H. Giddings, a sociologist in the early part of the century, compares statistical methods to the case study on the basis that the former are concerned with the distribution of a particular trait, or a small number of traits, in a population, whereas the case study is concerned with the whole variety of traits to be found in a particular instance" (Hammersley 95).

Case studies are not a new form of research; naturalistic inquiry was the primary research tool until the development of the scientific method. The fields of sociology and anthropology are credited with the primary shaping of the concept as we know it today. However, case study research has drawn from a number of other areas as well: the clinical methods of doctors; the casework technique being developed by social workers; the methods of historians and anthropologists, plus the qualitative descriptions provided by quantitative researchers like LePlay; and, in the case of Robert Park, the techniques of newspaper reporters and novelists.

Park was an ex-newspaper reporter and editor who became very influential in developing sociological case studies at the University of Chicago in the 1920s. As a newspaper professional he coined the term "scientific" or "depth" reporting: the description of local events in a way that pointed to major social trends. Park viewed the sociologist as "merely a more accurate, responsible, and scientific reporter." Park stressed the variety and value of human experience. He believed that sociology sought to arrive at natural, but fluid, laws and generalizations in regard to human nature and society. These laws weren't static laws of the kind sought by many positivists and natural law theorists, but rather, they were laws of becoming--with a constant possibility of change. Park encouraged students to get out of the library, to quit looking at papers and books, and to view the constant experiment of human experience. He writes, "Go and sit in the lounges of the luxury hotels and on the doorsteps of the flophouses; sit on the Gold Coast settees and on the slum shakedowns; sit in the Orchestra Hall and in the Star and Garter Burlesque. In short, gentlemen [sic], go get the seats of your pants dirty in real research."

But over the years, case studies have drawn their share of criticism. In fact, the method had its detractors from the start. In the 1920s, the debate between pro-qualitative and pro-quantitative became quite heated. Case studies, when compared to statistics, were considered by many to be unscientific. From the 1930's on, the rise of positivism had a growing influence on quantitative methods in sociology. People wanted static, generalizable laws in science. The sociological positivists were looking for stable laws of social phenomena. They criticized case study research because it failed to provide evidence of inter subjective agreement. Also, they condemned it because of the few number of cases studied and that the under-standardized character of their descriptions made generalization impossible. By the 1950s, quantitative methods, in the form of survey research, had become the dominant sociological approach and case study had become a minority practice.

Educational Applications

The 1950's marked the dawning of a new era in case study research, namely that of the utilization of the case study as a teaching method. "Instituted at Harvard Business School in the 1950s as a primary method of teaching, cases have since been used in classrooms and lecture halls alike, either as part of a course of study or as the main focus of the course to which other teaching material is added" (Armisted 1984). The basic purpose of instituting the case method as a teaching strategy was "to transfer much of the responsibility for learning from the teacher on to the student, whose role, as a result, shifts away from passive absorption toward active construction" (Boehrer 1990). Through careful examination and discussion of various cases, "students learn to identify actual problems, to recognize key players and their agendas, and to become aware of those aspects of the situation that contribute to the problem" (Merseth 1991). In addition, students are encouraged to "generate their own analysis of the problems under consideration, to develop their own solutions, and to practically apply their own knowledge of theory to these problems" (Boyce 1993). Along the way, students also develop "the power to analyze and to master a tangled circumstance by identifying and delineating important factors; the ability to utilize ideas, to test them against facts, and to throw them into fresh combinations" (Merseth 1991).

In addition to the practical application and testing of scholarly knowledge, case discussions can also help students prepare for real-world problems, situations and crises by providing an approximation of various professional environments (i.e. classroom, board room, courtroom, or hospital). Thus, through the examination of specific cases, students are given the opportunity to work out their own professional issues through the trials, tribulations, experiences, and research findings of others. An obvious advantage to this mode of instruction is that it allows students the exposure to settings and contexts that they might not otherwise experience. For example, a student interested in studying the effects of poverty on minority secondary student's grade point averages and S.A.T. scores could access and analyze information from schools as geographically diverse as Los Angeles, New York City, Miami, and New Mexico without ever having to leave the classroom.

The case study method also incorporates the idea that students can learn from one another "by engaging with each other and with each other's ideas, by asserting something and then having it questioned, challenged and thrown back at them so that they can reflect on what they hear, and then refine what they say" (Boehrer 1990). In summary, students can direct their own learning by formulating questions and taking responsibility for the study.

Types and Design Concerns

Researchers use multiple methods and approaches to conduct case studies.

Types of Case Studies

Under the more generalized category of case study exist several subdivisions, each of which is custom selected for use depending upon the goals and/or objectives of the investigator. These types of case study include the following:

Illustrative Case Studies These are primarily descriptive studies. They typically utilize one or two instances of an event to show what a situation is like. Illustrative case studies serve primarily to make the unfamiliar familiar and to give readers a common language about the topic in question.

Exploratory (or pilot) Case Studies These are condensed case studies performed before implementing a large scale investigation. Their basic function is to help identify questions and select types of measurement prior to the main investigation. The primary pitfall of this type of study is that initial findings may seem convincing enough to be released prematurely as conclusions.

Cumulative Case Studies These serve to aggregate information from several sites collected at different times. The idea behind these studies is the collection of past studies will allow for greater generalization without additional cost or time being expended on new, possibly repetitive studies.

Critical Instance Case Studies These examine one or more sites for either the purpose of examining a situation of unique interest with little to no interest in generalizability, or to call into question or challenge a highly generalized or universal assertion. This method is useful for answering cause and effect questions.

Identifying a Theoretical Perspective

Much of the case study's design is inherently determined for researchers, depending on the field from which they are working. In composition studies, researchers are typically working from a qualitative, descriptive standpoint. In contrast, physicists will approach their research from a more quantitative perspective. Still, in designing the study, researchers need to make explicit the questions to be explored and the theoretical perspective from which they will approach the case. The three most commonly adopted theories are listed below:

Individual Theories These focus primarily on the individual development, cognitive behavior, personality, learning and disability, and interpersonal interactions of a particular subject.

Organizational Theories These focus on bureaucracies, institutions, organizational structure and functions, or excellence in organizational performance.

Social Theories These focus on urban development, group behavior, cultural institutions, or marketplace functions.

Two examples of case studies are used consistently throughout this chapter. The first, a study produced by Berkenkotter, Huckin, and Ackerman (1988), looks at a first year graduate student's initiation into an academic writing program. The study uses participant-observer and linguistic data collecting techniques to assess the student's knowledge of appropriate discourse conventions. Using the pseudonym Nate to refer to the subject, the study sought to illuminate the particular experience rather than to generalize about the experience of fledgling academic writers collectively.

For example, in Berkenkotter, Huckin, and Ackerman's (1988) study we are told that the researchers are interested in disciplinary communities. In the first paragraph, they ask what constitutes membership in a disciplinary community and how achieving membership might affect a writer's understanding and production of texts. In the third paragraph they state that researchers must negotiate their claims "within the context of his sub specialty's accepted knowledge and methodology." In the next paragraph they ask, "How is literacy acquired? What is the process through which novices gain community membership? And what factors either aid or hinder students learning the requisite linguistic behaviors?" This introductory section ends with a paragraph in which the study's authors claim that during the course of the study, the subject, Nate, successfully makes the transition from "skilled novice" to become an initiated member of the academic discourse community and that his texts exhibit linguistic changes which indicate this transition. In the next section the authors make explicit the sociolinguistic theoretical and methodological assumptions on which the study is based (1988). Thus the reader has a good understanding of the authors' theoretical background and purpose in conducting the study even before it is explicitly stated on the fourth page of the study. "Our purpose was to examine the effects of the educational context on one graduate student's production of texts as he wrote in different courses and for different faculty members over the academic year 1984-85." The goal of the study then, was to explore the idea that writers must be initiated into a writing community, and that this initiation will change the way one writes.

The second example is Janet Emig's (1971) study of the composing process of a group of twelfth graders. In this study, Emig seeks to answer the question of what happens to the self as a result educational stimuli in terms of academic writing. The case study used methods such as protocol analysis, tape-recorded interviews, and discourse analysis.

In the case of Janet Emig's (1971) study of the composing process of eight twelfth graders, four specific hypotheses were made:

• Twelfth grade writers engage in two modes of composing: reflexive and extensive.
• These differences can be ascertained and characterized through having the writers compose aloud their composition process.
• A set of implied stylistic principles governs the writing process.
• For twelfth grade writers, extensive writing occurs chiefly as a school-sponsored activity, or reflexive, as a self-sponsored activity.

In this study, the chief distinction is between the two dominant modes of composing among older, secondary school students. The distinctions are:

• The reflexive mode, which focuses on the writer's thoughts and feelings.
• The extensive mode, which focuses on conveying a message.

Emig also outlines the specific questions which guided the research in the opening pages of her Review of Literature , preceding the report.

Designing a Case Study

After considering the different sub categories of case study and identifying a theoretical perspective, researchers can begin to design their study. Research design is the string of logic that ultimately links the data to be collected and the conclusions to be drawn to the initial questions of the study. Typically, research designs deal with at least four problems:

• What questions to study
• What data are relevant
• What data to collect
• How to analyze that data

In other words, a research design is basically a blueprint for getting from the beginning to the end of a study. The beginning is an initial set of questions to be answered, and the end is some set of conclusions about those questions.

Because case studies are conducted on topics as diverse as Anglo-Saxon Literature (Thrane 1986) and AIDS prevention (Van Vugt 1994), it is virtually impossible to outline any strict or universal method or design for conducting the case study. However, Robert K. Yin (1993) does offer five basic components of a research design:

• A study's questions.
• A study's propositions (if any).
• A study's units of analysis.
• The logic that links the data to the propositions.
• The criteria for interpreting the findings.

In addition to these five basic components, Yin also stresses the importance of clearly articulating one's theoretical perspective, determining the goals of the study, selecting one's subject(s), selecting the appropriate method(s) of collecting data, and providing some considerations to the composition of the final report.

Conducting Case Studies

To obtain as complete a picture of the participant as possible, case study researchers can employ a variety of approaches and methods. These approaches, methods, and related issues are discussed in depth in this section.

Method: Single or Multi-modal?

To obtain as complete a picture of the participant as possible, case study researchers can employ a variety of methods. Some common methods include interviews , protocol analyses, field studies, and participant-observations. Emig (1971) chose to use several methods of data collection. Her sources included conversations with the students, protocol analysis, discrete observations of actual composition, writing samples from each student, and school records (Lauer and Asher 1988).

Berkenkotter, Huckin, and Ackerman (1988) collected data by observing classrooms, conducting faculty and student interviews, collecting self reports from the subject, and by looking at the subject's written work.

A study that was criticized for using a single method model was done by Flower and Hayes (1984). In this study that explores the ways in which writers use different forms of knowing to create space, the authors used only protocol analysis to gather data. The study came under heavy fire because of their decision to use only one method.

Participant Selection

Case studies can use one participant, or a small group of participants. However, it is important that the participant pool remain relatively small. The participants can represent a diverse cross section of society, but this isn't necessary.

For example, the Berkenkotter, Huckin, and Ackerman (1988) study looked at just one participant, Nate. By contrast, in Janet Emig's (1971) study of the composition process of twelfth graders, eight participants were selected representing a diverse cross section of the community, with volunteers from an all-white upper-middle-class suburban school, an all-black inner-city school, a racially mixed lower-middle-class school, an economically and racially mixed school, and a university school.

Often, a brief "case history" is done on the participants of the study in order to provide researchers with a clearer understanding of their participants, as well as some insight as to how their own personal histories might affect the outcome of the study. For instance, in Emig's study, the investigator had access to the school records of five of the participants, and to standardized test scores for the remaining three. Also made available to the researcher was the information that three of the eight students were selected as NCTE Achievement Award winners. These personal histories can be useful in later stages of the study when data are being analyzed and conclusions drawn.

Data Collection

There are six types of data collected in case studies:

• Archival records.
• Interviews.
• Direct observation.
• Participant observation.

In the field of composition research, these six sources might be:

• A writer's drafts.
• School records of student writers.
• Transcripts of interviews with a writer.
• Transcripts of conversations between writers (and protocols).
• Videotapes and notes from direct field observations.
• Hard copies of a writer's work on computer.

Depending on whether researchers have chosen to use a single or multi-modal approach for the case study, they may choose to collect data from one or any combination of these sources.

Protocols, that is, transcriptions of participants talking aloud about what they are doing as they do it, have been particularly common in composition case studies. For example, in Emig's (1971) study, the students were asked, in four different sessions, to give oral autobiographies of their writing experiences and to compose aloud three themes in the presence of a tape recorder and the investigator.

In some studies, only one method of data collection is conducted. For example, the Flower and Hayes (1981) report on the cognitive process theory of writing depends on protocol analysis alone. However, using multiple sources of evidence to increase the reliability and validity of the data can be advantageous.

Case studies are likely to be much more convincing and accurate if they are based on several different sources of information, following a corroborating mode. This conclusion is echoed among many composition researchers. For example, in her study of predrafting processes of high and low-apprehensive writers, Cynthia Selfe (1985) argues that because "methods of indirect observation provide only an incomplete reflection of the complex set of processes involved in composing, a combination of several such methods should be used to gather data in any one study." Thus, in this study, Selfe collected her data from protocols, observations of students role playing their writing processes, audio taped interviews with the students, and videotaped observations of the students in the process of composing.

It can be said then, that cross checking data from multiple sources can help provide a multidimensional profile of composing activities in a particular setting. Sharan Merriam (1985) suggests "checking, verifying, testing, probing, and confirming collected data as you go, arguing that this process will follow in a funnel-like design resulting in less data gathering in later phases of the study along with a congruent increase in analysis checking, verifying, and confirming."

It is important to note that in case studies, as in any qualitative descriptive research, while researchers begin their studies with one or several questions driving the inquiry (which influence the key factors the researcher will be looking for during data collection), a researcher may find new key factors emerging during data collection. These might be unexpected patterns or linguistic features which become evident only during the course of the research. While not bearing directly on the researcher's guiding questions, these variables may become the basis for new questions asked at the end of the report, thus linking to the possibility of further research.

Data Analysis

As the information is collected, researchers strive to make sense of their data. Generally, researchers interpret their data in one of two ways: holistically or through coding. Holistic analysis does not attempt to break the evidence into parts, but rather to draw conclusions based on the text as a whole. Flower and Hayes (1981), for example, make inferences from entire sections of their students' protocols, rather than searching through the transcripts to look for isolatable characteristics.

However, composition researchers commonly interpret their data by coding, that is by systematically searching data to identify and/or categorize specific observable actions or characteristics. These observable actions then become the key variables in the study. Sharan Merriam (1988) suggests seven analytic frameworks for the organization and presentation of data:

• The role of participants.
• The network analysis of formal and informal exchanges among groups.
• Historical.
• Thematical.
• Ritual and symbolism.
• Critical incidents that challenge or reinforce fundamental beliefs, practices, and values.

There are two purposes of these frameworks: to look for patterns among the data and to look for patterns that give meaning to the case study.

As stated above, while most researchers begin their case studies expecting to look for particular observable characteristics, it is not unusual for key variables to emerge during data collection. Typical variables coded in case studies of writers include pauses writers make in the production of a text, the use of specific linguistic units (such as nouns or verbs), and writing processes (planning, drafting, revising, and editing). In the Berkenkotter, Huckin, and Ackerman (1988) study, for example, researchers coded the participant's texts for use of connectives, discourse demonstratives, average sentence length, off-register words, use of the first person pronoun, and the ratio of definite articles to indefinite articles.

Since coding is inherently subjective, more than one coder is usually employed. In the Berkenkotter, Huckin, and Ackerman (1988) study, for example, three rhetoricians were employed to code the participant's texts for off-register phrases. The researchers established the agreement among the coders before concluding that the participant used fewer off-register words as the graduate program progressed.

Composing the Case Study Report

In the many forms it can take, "a case study is generically a story; it presents the concrete narrative detail of actual, or at least realistic events, it has a plot, exposition, characters, and sometimes even dialogue" (Boehrer 1990). Generally, case study reports are extensively descriptive, with "the most problematic issue often referred to as being the determination of the right combination of description and analysis" (1990). Typically, authors address each step of the research process, and attempt to give the reader as much context as possible for the decisions made in the research design and for the conclusions drawn.

This contextualization usually includes a detailed explanation of the researchers' theoretical positions, of how those theories drove the inquiry or led to the guiding research questions, of the participants' backgrounds, of the processes of data collection, of the training and limitations of the coders, along with a strong attempt to make connections between the data and the conclusions evident.

Although the Berkenkotter, Huckin, and Ackerman (1988) study does not, case study reports often include the reactions of the participants to the study or to the researchers' conclusions. Because case studies tend to be exploratory, most end with implications for further study. Here researchers may identify significant variables that emerged during the research and suggest studies related to these, or the authors may suggest further general questions that their case study generated.

For example, Emig's (1971) study concludes with a section dedicated solely to the topic of implications for further research, in which she suggests several means by which this particular study could have been improved, as well as questions and ideas raised by this study which other researchers might like to address, such as: is there a correlation between a certain personality and a certain composing process profile (e.g. is there a positive correlation between ego strength and persistence in revising)?

Also included in Emig's study is a section dedicated to implications for teaching, which outlines the pedagogical ramifications of the study's findings for teachers currently involved in high school writing programs.

Sharan Merriam (1985) also offers several suggestions for alternative presentations of data:

• Prepare specialized condensations for appropriate groups.
• Replace narrative sections with a series of answers to open-ended questions.
• Present "skimmer's" summaries at beginning of each section.
• Incorporate headlines that encapsulate information from text.
• Prepare analytic summaries with supporting data appendixes.
• Present data in colorful and/or unique graphic representations.

Issues of Validity and Reliability

Once key variables have been identified, they can be analyzed. Reliability becomes a key concern at this stage, and many case study researchers go to great lengths to ensure that their interpretations of the data will be both reliable and valid. Because issues of validity and reliability are an important part of any study in the social sciences, it is important to identify some ways of dealing with results.

Multi-modal case study researchers often balance the results of their coding with data from interviews or writer's reflections upon their own work. Consequently, the researchers' conclusions become highly contextualized. For example, in a case study which looked at the time spent in different stages of the writing process, Berkenkotter concluded that her participant, Donald Murray, spent more time planning his essays than in other writing stages. The report of this case study is followed by Murray's reply, wherein he agrees with some of Berkenkotter's conclusions and disagrees with others.

As is the case with other research methodologies, issues of external validity, construct validity, and reliability need to be carefully considered.

Commentary on Case Studies

Researchers often debate the relative merits of particular methods, among them case study. In this section, we comment on two key issues. To read the commentaries, choose any of the items below:

Strengths and Weaknesses of Case Studies

Most case study advocates point out that case studies produce much more detailed information than what is available through a statistical analysis. Advocates will also hold that while statistical methods might be able to deal with situations where behavior is homogeneous and routine, case studies are needed to deal with creativity, innovation, and context. Detractors argue that case studies are difficult to generalize because of inherent subjectivity and because they are based on qualitative subjective data, generalizable only to a particular context.

Flexibility

The case study approach is a comparatively flexible method of scientific research. Because its project designs seem to emphasize exploration rather than prescription or prediction, researchers are comparatively freer to discover and address issues as they arise in their experiments. In addition, the looser format of case studies allows researchers to begin with broad questions and narrow their focus as their experiment progresses rather than attempt to predict every possible outcome before the experiment is conducted.

Emphasis on Context

By seeking to understand as much as possible about a single subject or small group of subjects, case studies specialize in "deep data," or "thick description"--information based on particular contexts that can give research results a more human face. This emphasis can help bridge the gap between abstract research and concrete practice by allowing researchers to compare their firsthand observations with the quantitative results obtained through other methods of research.

Inherent Subjectivity

"The case study has long been stereotyped as the weak sibling among social science methods," and is often criticized as being too subjective and even pseudo-scientific. Likewise, "investigators who do case studies are often regarded as having deviated from their academic disciplines, and their investigations as having insufficient precision (that is, quantification), objectivity and rigor" (Yin 1989). Opponents cite opportunities for subjectivity in the implementation, presentation, and evaluation of case study research. The approach relies on personal interpretation of data and inferences. Results may not be generalizable, are difficult to test for validity, and rarely offer a problem-solving prescription. Simply put, relying on one or a few subjects as a basis for cognitive extrapolations runs the risk of inferring too much from what might be circumstance.

High Investment

Case studies can involve learning more about the subjects being tested than most researchers would care to know--their educational background, emotional background, perceptions of themselves and their surroundings, their likes, dislikes, and so on. Because of its emphasis on "deep data," the case study is out of reach for many large-scale research projects which look at a subject pool in the tens of thousands. A budget request of $10,000 to examine 200 subjects sounds more efficient than a similar request to examine four subjects.

Ethical Considerations

Researchers conducting case studies should consider certain ethical issues. For example, many educational case studies are often financed by people who have, either directly or indirectly, power over both those being studied and those conducting the investigation (1985). This conflict of interests can hinder the credibility of the study.

The personal integrity, sensitivity, and possible prejudices and/or biases of the investigators need to be taken into consideration as well. Personal biases can creep into how the research is conducted, alternative research methods used, and the preparation of surveys and questionnaires.

A common complaint in case study research is that investigators change direction during the course of the study unaware that their original research design was inadequate for the revised investigation. Thus, the researchers leave unknown gaps and biases in the study. To avoid this, researchers should report preliminary findings so that the likelihood of bias will be reduced.

Concerns about Reliability, Validity, and Generalizability

Merriam (1985) offers several suggestions for how case study researchers might actively combat the popular attacks on the validity, reliability, and generalizability of case studies:

• Prolong the Processes of Data Gathering on Site: This will help to insure the accuracy of the findings by providing the researcher with more concrete information upon which to formulate interpretations.
• Employ the Process of "Triangulation": Use a variety of data sources as opposed to relying solely upon one avenue of observation. One example of such a data check would be what McClintock, Brannon, and Maynard (1985) refer to as a "case cluster method," that is, when a single unit within a larger case is randomly sampled, and that data treated quantitatively." For instance, in Emig's (1971) study, the case cluster method was employed, singling out the productivity of a single student named Lynn. This cluster profile included an advanced case history of the subject, specific examination and analysis of individual compositions and protocols, and extensive interview sessions. The seven remaining students were then compared with the case of Lynn, to ascertain if there are any shared, or unique dimensions to the composing process engaged in by these eight students.
• Conduct Member Checks: Initiate and maintain an active corroboration on the interpretation of data between the researcher and those who provided the data. In other words, talk to your subjects.
• Collect Referential Materials: Complement the file of materials from the actual site with additional document support. For example, Emig (1971) supports her initial propositions with historical accounts by writers such as T.S. Eliot, James Joyce, and D.H. Lawrence. Emig also cites examples of theoretical research done with regards to the creative process, as well as examples of empirical research dealing with the writing of adolescents. Specific attention is then given to the four stages description of the composing process delineated by Helmoltz, Wallas, and Cowley, as it serves as the focal point in this study.
• Engage in Peer Consultation: Prior to composing the final draft of the report, researchers should consult with colleagues in order to establish validity through pooled judgment.

Although little can be done to combat challenges concerning the generalizability of case studies, "most writers suggest that qualitative research should be judged as credible and confirmable as opposed to valid and reliable" (Merriam 1985). Likewise, it has been argued that "rather than transplanting statistical, quantitative notions of generalizability and thus finding qualitative research inadequate, it makes more sense to develop an understanding of generalization that is congruent with the basic characteristics of qualitative inquiry" (1985). After all, criticizing the case study method for being ungeneralizable is comparable to criticizing a washing machine for not being able to tell the correct time. In other words, it is unjust to criticize a method for not being able to do something which it was never originally designed to do in the first place.

Annotated Bibliography

Armisted, C. (1984). How Useful are Case Studies. Training and Development Journal, 38 (2), 75-77.

This article looks at eight types of case studies, offers pros and cons of using case studies in the classroom, and gives suggestions for successfully writing and using case studies.

Bardovi-Harlig, K. (1997). Beyond Methods: Components of Second Language Teacher Education . New York: McGraw-Hill.

A compilation of various research essays which address issues of language teacher education. Essays included are: "Non-native reading research and theory" by Lee, "The case for Psycholinguistics" by VanPatten, and "Assessment and Second Language Teaching" by Gradman and Reed.

Bartlett, L. (1989). A Question of Good Judgment; Interpretation Theory and Qualitative Enquiry Address. 70th Annual Meeting of the American Educational Research Association. San Francisco.

Bartlett selected "quasi-historical" methodology, which focuses on the "truth" found in case records, as one that will provide "good judgments" in educational inquiry. He argues that although the method is not comprehensive, it can try to connect theory with practice.

Baydere, S. et. al. (1993). Multimedia conferencing as a tool for collaborative writing: a case study in Computer Supported Collaborative Writing. New York: Springer-Verlag.

The case study by Baydere et. al. is just one of the many essays in this book found in the series "Computer Supported Cooperative Work." Denley, Witefield and May explore similar issues in their essay, "A case study in task analysis for the design of a collaborative document production system."

Berkenkotter, C., Huckin, T., N., & Ackerman J. (1988). Conventions, Conversations, and the Writer: Case Study of a Student in a Rhetoric Ph.D. Program. Research in the Teaching of English, 22, 9-44.

The authors focused on how the writing of their subject, Nate or Ackerman, changed as he became more acquainted or familiar with his field's discourse community.

Berninger, V., W., and Gans, B., M. (1986). Language Profiles in Nonspeaking Individuals of Normal Intelligence with Severe Cerebral Palsy. Augmentative and Alternative Communication, 2, 45-50.

Argues that generalizations about language abilities in patients with severe cerebral palsy (CP) should be avoided. Standardized tests of different levels of processing oral language, of processing written language, and of producing written language were administered to 3 male participants (aged 9, 16, and 40 yrs).

Bockman, J., R., and Couture, B. (1984). The Case Method in Technical Communication: Theory and Models. Texas: Association of Teachers of Technical Writing.

Examines the study and teaching of technical writing, communication of technical information, and the case method in terms of those applications.

Boehrer, J. (1990). Teaching With Cases: Learning to Question. New Directions for Teaching and Learning, 42 41-57.

This article discusses the origins of the case method, looks at the question of what is a case, gives ideas about learning in case teaching, the purposes it can serve in the classroom, the ground rules for the case discussion, including the role of the question, and new directions for case teaching.

Bowman, W. R. (1993). Evaluating JTPA Programs for Economically Disadvantaged Adults: A Case Study of Utah and General Findings . Washington: National Commission for Employment Policy.

"To encourage state-level evaluations of JTPA, the Commission and the State of Utah co-sponsored this report on the effectiveness of JTPA Title II programs for adults in Utah. The technique used is non-experimental and the comparison group was selected from registrants with Utah's Employment Security. In a step-by-step approach, the report documents how non-experimental techniques can be applied and several specific technical issues can be addressed."

Boyce, A. (1993) The Case Study Approach for Pedagogists. Annual Meeting of the American Alliance for Health, Physical Education, Recreation and Dance. (Address). Washington DC.

This paper addresses how case studies 1) bridge the gap between teaching theory and application, 2) enable students to analyze problems and develop solutions for situations that will be encountered in the real world of teaching, and 3) helps students to evaluate the feasibility of alternatives and to understand the ramifications of a particular course of action.

Carson, J. (1993) The Case Study: Ideal Home of WAC Quantitative and Qualitative Data. Annual Meeting of the Conference on College Composition and Communication. (Address). San Diego.

"Increasingly, one of the most pressing questions for WAC advocates is how to keep [WAC] programs going in the face of numerous difficulties. Case histories offer the best chance for fashioning rhetorical arguments to keep WAC programs going because they offer the opportunity to provide a coherent narrative that contextualizes all documents and data, including what is generally considered scientific data. A case study of the WAC program, . . . at Robert Morris College in Pittsburgh demonstrates the advantages of this research method. Such studies are ideal homes for both naturalistic and positivistic data as well as both quantitative and qualitative information."

---. (1991). A Cognitive Process Theory of Writing. College Composition and Communication. 32. 365-87.

No abstract available.

Cromer, R. (1994) A Case Study of Dissociations Between Language and Cognition. Constraints on Language Acquisition: Studies of Atypical Children . Hillsdale: Lawrence Erlbaum Associates, 141-153.

Crossley, M. (1983) Case Study in Comparative and International Education: An Approach to Bridging the Theory-Practice Gap. Proceedings of the 11th Annual Conference of the Australian Comparative and International Education Society. Hamilton, NZ.

Case study research, as presented here, helps bridge the theory-practice gap in comparative and international research studies of education because it focuses on the practical, day-to-day context rather than on the national arena. The paper asserts that the case study method can be valuable at all levels of research, formation, and verification of theories in education.

Daillak, R., H., and Alkin, M., C. (1982). Qualitative Studies in Context: Reflections on the CSE Studies of Evaluation Use . California: EDRS

The report shows how the Center of the Study of Evaluation (CSE) applied qualitative techniques to a study of evaluation information use in local, Los Angeles schools. It critiques the effectiveness and the limitations of using case study, evaluation, field study, and user interview survey methodologies.

Davey, L. (1991). The Application of Case Study Evaluations. ERIC/TM Digest.

This article examines six types of case studies, the type of evaluation questions that can be answered, the functions served, some design features, and some pitfalls of the method.

Deutch, C. E. (1996). A course in research ethics for graduate students. College Teaching, 44, 2, 56-60.

This article describes a one-credit discussion course in research ethics for graduate students in biology. Case studies are focused on within the four parts of the course: 1) major issues, 2 )practical issues in scholarly work, 3) ownership of research results, and 4) training and personal decisions.

DeVoss, G. (1981). Ethics in Fieldwork Research. RIE 27p. (ERIC)

This article examines four of the ethical problems that can happen when conducting case study research: acquiring permission to do research, knowing when to stop digging, the pitfalls of doing collaborative research, and preserving the integrity of the participants.

Driscoll, A. (1985). Case Study of a Research Intervention: the University of Utah’s Collaborative Approach . San Francisco: Far West Library for Educational Research Development.

Paper presented at the annual meeting of the American Association of Colleges of Teacher Education, Denver, CO, March 1985. Offers information of in-service training, specifically case studies application.

Ellram, L. M. (1996). The Use of the Case Study Method in Logistics Research. Journal of Business Logistics, 17, 2, 93.

This article discusses the increased use of case study in business research, and the lack of understanding of when and how to use case study methodology in business.

Emig, J. (1971) The Composing Processes of Twelfth Graders . Urbana: NTCE.

This case study uses observation, tape recordings, writing samples, and school records to show that writing in reflexive and extensive situations caused different lengths of discourse and different clusterings of the components of the writing process.

Feagin, J. R. (1991). A Case For the Case Study . Chapel Hill: The University of North Carolina Press.

This book discusses the nature, characteristics, and basic methodological issues of the case study as a research method.

Feldman, H., Holland, A., & Keefe, K. (1989) Language Abilities after Left Hemisphere Brain Injury: A Case Study of Twins. Topics in Early Childhood Special Education, 9, 32-47.

"Describes the language abilities of 2 twin pairs in which 1 twin (the experimental) suffered brain injury to the left cerebral hemisphere around the time of birth and1 twin (the control) did not. One pair of twins was initially assessed at age 23 mo. and the other at about 30 mo.; they were subsequently evaluated in their homes 3 times at about 6-mo intervals."

Fidel, R. (1984). The Case Study Method: A Case Study. Library and Information Science Research, 6.

The article describes the use of case study methodology to systematically develop a model of online searching behavior in which study design is flexible, subject manner determines data gathering and analyses, and procedures adapt to the study's progressive change.

Flower, L., & Hayes, J. R. (1984). Images, Plans and Prose: The Representation of Meaning in Writing. Written Communication, 1, 120-160.

Explores the ways in which writers actually use different forms of knowing to create prose.

Frey, L. R. (1992). Interpreting Communication Research: A Case Study Approach Englewood Cliffs, N.J.: Prentice Hall.

The book discusses research methodologies in the Communication field. It focuses on how case studies bridge the gap between communication research, theory, and practice.

Gilbert, V. K. (1981). The Case Study as a Research Methodology: Difficulties and Advantages of Integrating the Positivistic, Phenomenological and Grounded Theory Approaches . The Annual Meeting of the Canadian Association for the Study of Educational Administration. (Address) Halifax, NS, Can.

This study on an innovative secondary school in England shows how a "low-profile" participant-observer case study was crucial to the initial observation, the testing of hypotheses, the interpretive approach, and the grounded theory.

Gilgun, J. F. (1994). A Case for Case Studies in Social Work Research. Social Work, 39, 4, 371-381.

This article defines case study research, presents guidelines for evaluation of case studies, and shows the relevance of case studies to social work research. It also looks at issues such as evaluation and interpretations of case studies.

Glennan, S. L., Sharp-Bittner, M. A. & Tullos, D. C. (1991). Augmentative and Alternative Communication Training with a Nonspeaking Adult: Lessons from MH. Augmentative and Alternative Communication, 7, 240-7.

"A response-guided case study documented changes in a nonspeaking 36-yr-old man's ability to communicate using 3 trained augmentative communication modes. . . . Data were collected in videotaped interaction sessions between the nonspeaking adult and a series of adult speaking."

Graves, D. (1981). An Examination of the Writing Processes of Seven Year Old Children. Research in the Teaching of English, 15, 113-134.

Hamel, J. (1993). Case Study Methods . Newbury Park: Sage. .

"In a most economical fashion, Hamel provides a practical guide for producing theoretically sharp and empirically sound sociological case studies. A central idea put forth by Hamel is that case studies must "locate the global in the local" thus making the careful selection of the research site the most critical decision in the analytic process."

Karthigesu, R. (1986, July). Television as a Tool for Nation-Building in the Third World: A Post-Colonial Pattern, Using Malaysia as a Case-Study. International Television Studies Conference. (Address). London, 10-12.

"The extent to which Television Malaysia, as a national mass media organization, has been able to play a role in nation building in the post-colonial period is . . . studied in two parts: how the choice of a model of nation building determines the character of the organization; and how the character of the organization influences the output of the organization."

Kenny, R. (1984). Making the Case for the Case Study. Journal of Curriculum Studies, 16, (1), 37-51.

The article looks at how and why the case study is justified as a viable and valuable approach to educational research and program evaluation.

Knirk, F. (1991). Case Materials: Research and Practice. Performance Improvement Quarterly, 4 (1 ), 73-81.

The article addresses the effectiveness of case studies, subject areas where case studies are commonly used, recent examples of their use, and case study design considerations.

Klos, D. (1976). Students as Case Writers. Teaching of Psychology, 3.2, 63-66.

This article reviews a course in which students gather data for an original case study of another person. The task requires the students to design the study, collect the data, write the narrative, and interpret the findings.

Leftwich, A. (1981). The Politics of Case Study: Problems of Innovation in University Education. Higher Education Review, 13.2, 38-64.

The article discusses the use of case studies as a teaching method. Emphasis is on the instructional materials, interdisciplinarity, and the complex relationships within the university that help or hinder the method.

Mabrito, M. (1991, Oct.). Electronic Mail as a Vehicle for Peer Response: Conversations of High and Low Apprehensive Writers. Written Communication, 509-32.

McCarthy, S., J. (1955). The Influence of Classroom Discourse on Student Texts: The Case of Ella . East Lansing: Institute for Research on Teaching.

A look at how students of color become marginalized within traditional classroom discourse. The essay follows the struggles of one black student: Ella.

Matsuhashi, A., ed. (1987). Writing in Real Time: Modeling Production Processes Norwood, NJ: Ablex Publishing Corporation.

Investigates how writers plan to produce discourse for different purposes to report, to generalize, and to persuade, as well as how writers plan for sentence level units of language. To learn about planning, an observational measure of pause time was used" (ERIC).

Merriam, S. B. (1985). The Case Study in Educational Research: A Review of Selected Literature. Journal of Educational Thought, 19.3, 204-17.

The article examines the characteristics of, philosophical assumptions underlying the case study, the mechanics of conducting a case study, and the concerns about the reliability, validity, and generalizability of the method.

---. (1988). Case Study Research in Education: A Qualitative Approach San Francisco: Jossey Bass.

Merry, S. E., & Milner, N. eds. (1993). The Possibility of Popular Justice: A Case Study of Community Mediation in the United States . Ann Arbor: U of Michigan.

". . . this volume presents a case study of one experiment in popular justice, the San Francisco Community Boards. This program has made an explicit claim to create an alternative justice, or new justice, in the midst of a society ordered by state law. The contributors to this volume explore the history and experience of the program and compare it to other versions of popular justice in the United States, Europe, and the Third World."

Merseth, K. K. (1991). The Case for Cases in Teacher Education. RIE. 42p. (ERIC).

This monograph argues that the case method of instruction offers unique potential for revitalizing the field of teacher education.

Michaels, S. (1987). Text and Context: A New Approach to the Study of Classroom Writing. Discourse Processes, 10, 321-346.

"This paper argues for and illustrates an approach to the study of writing that integrates ethnographic analysis of classroom interaction with linguistic analysis of written texts and teacher/student conversational exchanges. The approach is illustrated through a case study of writing in a single sixth grade classroom during a single writing assignment."

Milburn, G. (1995). Deciphering a Code or Unraveling a Riddle: A Case Study in the Application of a Humanistic Metaphor to the Reporting of Social Studies Teaching. Theory and Research in Education, 13.

This citation serves as an example of how case studies document learning procedures in a senior-level economics course.

Milley, J. E. (1979). An Investigation of Case Study as an Approach to Program Evaluation. 19th Annual Forum of the Association for Institutional Research. (Address). San Diego.

The case study method merged a narrative report focusing on the evaluator as participant-observer with document review, interview, content analysis, attitude questionnaire survey, and sociogram analysis. Milley argues that case study program evaluation has great potential for widespread use.

Minnis, J. R. (1985, Sept.). Ethnography, Case Study, Grounded Theory, and Distance Education Research. Distance Education, 6.2.

This article describes and defines the strengths and weaknesses of ethnography, case study, and grounded theory.

Nunan, D. (1992). Collaborative language learning and teaching . New York: Cambridge University Press.

Included in this series of essays is Peter Sturman’s "Team Teaching: a case study from Japan" and David Nunan’s own "Toward a collaborative approach to curriculum development: a case study."

Nystrand, M., ed. (1982). What Writers Know: The Language, Process, and Structure of Written Discourse . New York: Academic Press.

Owenby, P. H. (1992). Making Case Studies Come Alive. Training, 29, (1), 43-46. (ERIC)

This article provides tips for writing more effective case studies.

---. (1981). Pausing and Planning: The Tempo of Writer Discourse Production. Research in the Teaching of English, 15 (2),113-34.

Perl, S. (1979). The Composing Processes of Unskilled College Writers. Research in the Teaching of English, 13, 317-336.

"Summarizes a study of five unskilled college writers, focusing especially on one of the five, and discusses the findings in light of current pedagogical practice and research design."

Pilcher J. and A. Coffey. eds. (1996). Gender and Qualitative Research . Brookfield: Aldershot, Hants, England.

This book provides a series of essays which look at gender identity research, qualitative research and applications of case study to questions of gendered pedagogy.

Pirie, B. S. (1993). The Case of Morty: A Four Year Study. Gifted Education International, 9 (2), 105-109.

This case study describes a boy from kindergarten through third grade with above average intelligence but difficulty in learning to read, write, and spell.

Popkewitz, T. (1993). Changing Patterns of Power: Social Regulation and Teacher Education Reform. Albany: SUNY Press.

Popkewitz edits this series of essays that address case studies on educational change and the training of teachers. The essays vary in terms of discipline and scope. Also, several authors include case studies of educational practices in countries other than the United States.

---. (1984). The Predrafting Processes of Four High- and Four Low Apprehensive Writers. Research in the Teaching of English, 18, (1), 45-64.

Rasmussen, P. (1985, March) A Case Study on the Evaluation of Research at the Technical University of Denmark. International Journal of Institutional Management in Higher Education, 9 (1).

This is an example of a case study methodology used to evaluate the chemistry and chemical engineering departments at the University of Denmark.

Roth, K. J. (1986). Curriculum Materials, Teacher Talk, and Student Learning: Case Studies in Fifth-Grade Science Teaching . East Lansing: Institute for Research on Teaching.

Roth offers case studies on elementary teachers, elementary school teaching, science studies and teaching, and verbal learning.

Selfe, C. L. (1985). An Apprehensive Writer Composes. When a Writer Can't Write: Studies in Writer's Block and Other Composing-Process Problems . (pp. 83-95). Ed. Mike Rose. NMY: Guilford.

Smith-Lewis, M., R. and Ford, A. (1987). A User's Perspective on Augmentative Communication. Augmentative and Alternative Communication, 3, 12-7.

"During a series of in-depth interviews, a 25-yr-old woman with cerebral palsy who utilized augmentative communication reflected on the effectiveness of the devices designed for her during her school career."

St. Pierre, R., G. (1980, April). Follow Through: A Case Study in Metaevaluation Research . 64th Annual Meeting of the American Educational Research Association. (Address).

The three approaches to metaevaluation are evaluation of primary evaluations, integrative meta-analysis with combined primary evaluation results, and re-analysis of the raw data from a primary evaluation.

Stahler, T., M. (1996, Feb.) Early Field Experiences: A Model That Worked. ERIC.

"This case study of a field and theory class examines a model designed to provide meaningful field experiences for preservice teachers while remaining consistent with the instructor's beliefs about the role of teacher education in preparing teachers for the classroom."

Stake, R. E. (1995). The Art of Case Study Research. Thousand Oaks: Sage Publications.

This book examines case study research in education and case study methodology.

Stiegelbauer, S. (1984) Community, Context, and Co-curriculum: Situational Factors Influencing School Improvements in a Study of High Schools. Presented at the annual meeting of the American Educational Research Association, New Orleans, LA.

Discussion of several case studies: one looking at high school environments, another examining educational innovations.

Stolovitch, H. (1990). Case Study Method. Performance And Instruction, 29, (9), 35-37.

This article describes the case study method as a form of simulation and presents guidelines for their use in professional training situations.

Thaller, E. (1994). Bibliography for the Case Method: Using Case Studies in Teacher Education. RIE. 37 p.

This bibliography presents approximately 450 citations on the use of case studies in teacher education from 1921-1993.

Thrane, T. (1986). On Delimiting the Senses of Near-Synonyms in Historical Semantics: A Case Study of Adjectives of 'Moral Sufficiency' in the Old English Andreas. Linguistics Across Historical and Geographical Boundaries: In Honor of Jacek Fisiak on the Occasion of his Fiftieth Birthday . Berlin: Mouton de Gruyter.

United Nations. (1975). Food and Agriculture Organization. Report on the FAO/UNFPA Seminar on Methodology, Research and Country: Case Studies on Population, Employment and Productivity . Rome: United Nations.

This example case study shows how the methodology can be used in a demographic and psychographic evaluation. At the same time, it discusses the formation and instigation of the case study methodology itself.

Van Vugt, J. P., ed. (1994). Aids Prevention and Services: Community Based Research . Westport: Bergin and Garvey.

"This volume has been five years in the making. In the process, some of the policy applications called for have met with limited success, such as free needle exchange programs in a limited number of American cities, providing condoms to prison inmates, and advertisements that depict same-sex couples. Rather than dating our chapters that deal with such subjects, such policy applications are verifications of the type of research demonstrated here. Furthermore, they indicate the critical need to continue community based research in the various communities threatened by acquired immuno-deficiency syndrome (AIDS) . . . "

Welch, W., ed. (1981, May). Case Study Methodology in Educational Evaluation. Proceedings of the Minnesota Evaluation Conference. Minnesota. (Address).

The four papers in these proceedings provide a comprehensive picture of the rationale, methodology, strengths, and limitations of case studies.

Williams, G. (1987). The Case Method: An Approach to Teaching and Learning in Educational Administration. RIE, 31p.

This paper examines the viability of the case method as a teaching and learning strategy in instructional systems geared toward the training of personnel of the administration of various aspects of educational systems.

Yin, R. K. (1993). Advancing Rigorous Methodologies: A Review of 'Towards Rigor in Reviews of Multivocal Literatures.' Review of Educational Research, 61, (3).

"R. T. Ogawa and B. Malen's article does not meet its own recommended standards for rigorous testing and presentation of its own conclusions. Use of the exploratory case study to analyze multivocal literatures is not supported, and the claim of grounded theory to analyze multivocal literatures may be stronger."

---. (1989). Case Study Research: Design and Methods. London: Sage Publications Inc.

This book discusses in great detail, the entire design process of the case study, including entire chapters on collecting evidence, analyzing evidence, composing the case study report, and designing single and multiple case studies.

Related Links

Consider the following list of related Web sites for more information on the topic of case study research. Note: although many of the links cover the general category of qualitative research, all have sections that address issues of case studies.

• Sage Publications on Qualitative Methodology: Search here for a comprehensive list of new books being published about "Qualitative Methodology" http://www.sagepub.co.uk/
• The International Journal of Qualitative Studies in Education: An on-line journal "to enhance the theory and practice of qualitative research in education." On-line submissions are welcome. http://www.tandf.co.uk/journals/tf/09518398.html
• Qualitative Research Resources on the Internet: From syllabi to home pages to bibliographies. All links relate somehow to qualitative research. http://www.nova.edu/ssss/QR/qualres.html

Becker, Bronwyn, Patrick Dawson, Karen Devine, Carla Hannum, Steve Hill, Jon Leydens, Debbie Matuskevich, Carol Traver, & Mike Palmquist. (2005). Case Studies. Writing@CSU . Colorado State University. https://writing.colostate.edu/guides/guide.cfm?guideid=60

How to Write a Case Study - All You Wanted to Know

What do you study in your college? If you are a psychology, sociology, or anthropology student, we bet you might be familiar with what a case study is. This research method is used to study a certain person, group, or situation. In this guide from our dissertation writing service , you will learn how to write a case study professionally, from researching to citing sources properly. Also, we will explore different types of case studies and show you examples — so that you won’t have any other questions left.

What Is a Case Study?

A case study is a subcategory of research design which investigates problems and offers solutions. Case studies can range from academic research studies to corporate promotional tools trying to sell an idea—their scope is quite vast.

What Is the Difference Between a Research Paper and a Case Study?

While research papers turn the reader’s attention to a certain problem, case studies go even further. Case study guidelines require students to pay attention to details, examining issues closely and in-depth using different research methods. For example, case studies may be used to examine court cases if you study Law, or a patient's health history if you study Medicine. Case studies are also used in Marketing, which are thorough, empirically supported analysis of a good or service's performance. Well-designed case studies can be valuable for prospective customers as they can identify and solve the potential customers pain point.

Case studies involve a lot of storytelling – they usually examine particular cases for a person or a group of people. This method of research is very helpful, as it is very practical and can give a lot of hands-on information. Most commonly, the length of the case study is about 500-900 words, which is much less than the length of an average research paper.

The structure of a case study is very similar to storytelling. It has a protagonist or main character, which in your case is actually a problem you are trying to solve. You can use the system of 3 Acts to make it a compelling story. It should have an introduction, rising action, a climax where transformation occurs, falling action, and a solution.

Here is a rough formula for you to use in your case study:

Problem (Act I): > Solution (Act II) > Result (Act III) > Conclusion.

Types of Case Studies

The purpose of a case study is to provide detailed reports on an event, an institution, a place, future customers, or pretty much anything. There are a few common types of case study, but the type depends on the topic. The following are the most common domains where case studies are needed:

• Historical case studies are great to learn from. Historical events have a multitude of source info offering different perspectives. There are always modern parallels where these perspectives can be applied, compared, and thoroughly analyzed.
• Problem-oriented case studies are usually used for solving problems. These are often assigned as theoretical situations where you need to immerse yourself in the situation to examine it. Imagine you’re working for a startup and you’ve just noticed a significant flaw in your product’s design. Before taking it to the senior manager, you want to do a comprehensive study on the issue and provide solutions. On a greater scale, problem-oriented case studies are a vital part of relevant socio-economic discussions.
• Cumulative case studies collect information and offer comparisons. In business, case studies are often used to tell people about the value of a product.
• Critical case studies explore the causes and effects of a certain case.
• Illustrative case studies describe certain events, investigating outcomes and lessons learned.

Need a compelling case study? EssayPro has got you covered. Our experts are ready to provide you with detailed, insightful case studies that capture the essence of real-world scenarios. Elevate your academic work with our professional assistance.

Case Study Format

The case study format is typically made up of eight parts:

• Executive Summary. Explain what you will examine in the case study. Write an overview of the field you’re researching. Make a thesis statement and sum up the results of your observation in a maximum of 2 sentences.
• Background. Provide background information and the most relevant facts. Isolate the issues.
• Case Evaluation. Isolate the sections of the study you want to focus on. In it, explain why something is working or is not working.
• Proposed Solutions. Offer realistic ways to solve what isn’t working or how to improve its current condition. Explain why these solutions work by offering testable evidence.
• Conclusion. Summarize the main points from the case evaluations and proposed solutions. 6. Recommendations. Talk about the strategy that you should choose. Explain why this choice is the most appropriate.
• Implementation. Explain how to put the specific strategies into action.
• References. Provide all the citations.

How to Write a Case Study

Let's discover how to write a case study.

Setting Up the Research

When writing a case study, remember that research should always come first. Reading many different sources and analyzing other points of view will help you come up with more creative solutions. You can also conduct an actual interview to thoroughly investigate the customer story that you'll need for your case study. Including all of the necessary research, writing a case study may take some time. The research process involves doing the following:

• Define your objective. Explain the reason why you’re presenting your subject. Figure out where you will feature your case study; whether it is written, on video, shown as an infographic, streamed as a podcast, etc.
• Determine who will be the right candidate for your case study. Get permission, quotes, and other features that will make your case study effective. Get in touch with your candidate to see if they approve of being part of your work. Study that candidate’s situation and note down what caused it.
• Identify which various consequences could result from the situation. Follow these guidelines on how to start a case study: surf the net to find some general information you might find useful.
• Make a list of credible sources and examine them. Seek out important facts and highlight problems. Always write down your ideas and make sure to brainstorm.
• Focus on several key issues – why they exist, and how they impact your research subject. Think of several unique solutions. Draw from class discussions, readings, and personal experience. When writing a case study, focus on the best solution and explore it in depth. After having all your research in place, writing a case study will be easy. You may first want to check the rubric and criteria of your assignment for the correct case study structure.

Read Also: ' WHAT IS A CREDIBLE SOURCES ?'

Although your instructor might be looking at slightly different criteria, every case study rubric essentially has the same standards. Your professor will want you to exhibit 8 different outcomes:

• Correctly identify the concepts, theories, and practices in the discipline.
• Identify the relevant theories and principles associated with the particular study.
• Evaluate legal and ethical principles and apply them to your decision-making.
• Recognize the global importance and contribution of your case.
• Construct a coherent summary and explanation of the study.
• Demonstrate analytical and critical-thinking skills.
• Explain the interrelationships between the environment and nature.
• Integrate theory and practice of the discipline within the analysis.

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Case Study Outline

Let's look at the structure of an outline based on the issue of the alcoholic addiction of 30 people.

Introduction

• Statement of the issue: Alcoholism is a disease rather than a weakness of character.
• Presentation of the problem: Alcoholism is affecting more than 14 million people in the USA, which makes it the third most common mental illness there.
• Explanation of the terms: In the past, alcoholism was commonly referred to as alcohol dependence or alcohol addiction. Alcoholism is now the more severe stage of this addiction in the disorder spectrum.
• Hypotheses: Drinking in excess can lead to the use of other drugs.
• Importance of your story: How the information you present can help people with their addictions.
• Background of the story: Include an explanation of why you chose this topic.
• Presentation of analysis and data: Describe the criteria for choosing 30 candidates, the structure of the interview, and the outcomes.
• Strong argument 1: ex. X% of candidates dealing with anxiety and depression...
• Strong argument 2: ex. X amount of people started drinking by their mid-teens.
• Strong argument 3: ex. X% of respondents’ parents had issues with alcohol.
• Concluding statement: I have researched if alcoholism is a disease and found out that…
• Recommendations: Ways and actions for preventing alcohol use.

Writing a Case Study Draft

After you’ve done your case study research and written the outline, it’s time to focus on the draft. In a draft, you have to develop and write your case study by using: the data which you collected throughout the research, interviews, and the analysis processes that were undertaken. Follow these rules for the draft:

Use Data to Illustrate Key Points in Your Case Study

Even though your case study is a story, it should be based on evidence. Use as much data as possible to illustrate your point. Without the right data, your case study may appear weak and the readers may not be able to relate to your issue as much as they should. Let's see the examples from essay writing service :

‍ With data: Alcoholism is affecting more than 14 million people in the USA, which makes it the third most common mental illness there. Without data: A lot of people suffer from alcoholism in the United States.

Try to include as many credible sources as possible. You may have terms or sources that could be hard for other cultures to understand. If this is the case, you should include them in the appendix or Notes for the Instructor or Professor.

Finalizing the Draft: Checklist

After you finish drafting your case study, polish it up by answering these ‘ask yourself’ questions and think about how to end your case study:

• Check that you follow the correct case study format, also in regards to text formatting.
• Check that your work is consistent with its referencing and citation style.
• Micro-editing — check for grammar and spelling issues.
• Macro-editing — does ‘the big picture’ come across to the reader? Is there enough raw data, such as real-life examples or personal experiences? Have you made your data collection process completely transparent? Does your analysis provide a clear conclusion, allowing for further research and practice?

Problems to avoid:

• Overgeneralization – Do not go into further research that deviates from the main problem.
• Failure to Document Limitations – Just as you have to clearly state the limitations of a general research study, you must describe the specific limitations inherent in the subject of analysis.
• Failure to Extrapolate All Possible Implications – Just as you don't want to over-generalize from your case study findings, you also have to be thorough in the consideration of all possible outcomes or recommendations derived from your findings.

How to Create a Title Page and Cite a Case Study

Let's see how to create an awesome title page.

Your title page depends on the prescribed citation format. The title page should include:

• A title that attracts some attention and describes your study
• The title should have the words “case study” in it
• The title should range between 5-9 words in length
• Your name and contact information
• Your finished paper should be only 500 to 1,500 words in length.With this type of assignment, write effectively and avoid fluff

Here is a template for the APA and MLA format title page:

There are some cases when you need to cite someone else's study in your own one – therefore, you need to master how to cite a case study. A case study is like a research paper when it comes to citations. You can cite it like you cite a book, depending on what style you need.

Citation Example in MLA ‍ Hill, Linda, Tarun Khanna, and Emily A. Stecker. HCL Technologies. Boston: Harvard Business Publishing, 2008. Print.

Citation Example in APA ‍ Hill, L., Khanna, T., & Stecker, E. A. (2008). HCL Technologies. Boston: Harvard Business Publishing.

Citation Example in Chicago Hill, Linda, Tarun Khanna, and Emily A. Stecker. HCL Technologies.

Case Study Examples

To give you an idea of a professional case study example, we gathered and linked some below.

Eastman Kodak Case Study

Case Study Example: Audi Trains Mexican Autoworkers in Germany

To conclude, a case study is one of the best methods of getting an overview of what happened to a person, a group, or a situation in practice. It allows you to have an in-depth glance at the real-life problems that businesses, healthcare industry, criminal justice, etc. may face. This insight helps us look at such situations in a different light. This is because we see scenarios that we otherwise would not, without necessarily being there. If you need custom essays , try our research paper writing services .

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What Is A Case Study?

How to cite a case study in apa, how to write a case study.

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is a seasoned educational writer focusing on scholarship guidance, research papers, and various forms of academic essays including reflective and narrative essays. His expertise also extends to detailed case studies. A scholar with a background in English Literature and Education, Daniel’s work on EssayPro blog aims to support students in achieving academic excellence and securing scholarships. His hobbies include reading classic literature and participating in academic forums.

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Case Study Research Method in Psychology

Saul Mcleod, PhD

Editor-in-Chief for Simply Psychology

BSc (Hons) Psychology, MRes, PhD, University of Manchester

Saul Mcleod, PhD., is a qualified psychology teacher with over 18 years of experience in further and higher education. He has been published in peer-reviewed journals, including the Journal of Clinical Psychology.

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Associate Editor for Simply Psychology

BSc (Hons) Psychology, MSc Psychology of Education

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Case studies are in-depth investigations of a person, group, event, or community. Typically, data is gathered from various sources using several methods (e.g., observations & interviews).

The case study research method originated in clinical medicine (the case history, i.e., the patient’s personal history). In psychology, case studies are often confined to the study of a particular individual.

The information is mainly biographical and relates to events in the individual’s past (i.e., retrospective), as well as to significant events that are currently occurring in his or her everyday life.

The case study is not a research method, but researchers select methods of data collection and analysis that will generate material suitable for case studies.

Freud (1909a, 1909b) conducted very detailed investigations into the private lives of his patients in an attempt to both understand and help them overcome their illnesses.

This makes it clear that the case study is a method that should only be used by a psychologist, therapist, or psychiatrist, i.e., someone with a professional qualification.

There is an ethical issue of competence. Only someone qualified to diagnose and treat a person can conduct a formal case study relating to atypical (i.e., abnormal) behavior or atypical development.

 Famous Case Studies

• Anna O – One of the most famous case studies, documenting psychoanalyst Josef Breuer’s treatment of “Anna O” (real name Bertha Pappenheim) for hysteria in the late 1800s using early psychoanalytic theory.
• Little Hans – A child psychoanalysis case study published by Sigmund Freud in 1909 analyzing his five-year-old patient Herbert Graf’s house phobia as related to the Oedipus complex.
• Bruce/Brenda – Gender identity case of the boy (Bruce) whose botched circumcision led psychologist John Money to advise gender reassignment and raise him as a girl (Brenda) in the 1960s.
• Genie Wiley – Linguistics/psychological development case of the victim of extreme isolation abuse who was studied in 1970s California for effects of early language deprivation on acquiring speech later in life.
• Phineas Gage – One of the most famous neuropsychology case studies analyzes personality changes in railroad worker Phineas Gage after an 1848 brain injury involving a tamping iron piercing his skull.

Clinical Case Studies

• Studying the effectiveness of psychotherapy approaches with an individual patient
• Assessing and treating mental illnesses like depression, anxiety disorders, PTSD
• Neuropsychological cases investigating brain injuries or disorders

Child Psychology Case Studies

• Studying psychological development from birth through adolescence
• Cases of learning disabilities, autism spectrum disorders, ADHD
• Effects of trauma, abuse, deprivation on development

Types of Case Studies

• Explanatory case studies : Used to explore causation in order to find underlying principles. Helpful for doing qualitative analysis to explain presumed causal links.
• Exploratory case studies : Used to explore situations where an intervention being evaluated has no clear set of outcomes. It helps define questions and hypotheses for future research.
• Descriptive case studies : Describe an intervention or phenomenon and the real-life context in which it occurred. It is helpful for illustrating certain topics within an evaluation.
• Multiple-case studies : Used to explore differences between cases and replicate findings across cases. Helpful for comparing and contrasting specific cases.
• Intrinsic : Used to gain a better understanding of a particular case. Helpful for capturing the complexity of a single case.
• Collective : Used to explore a general phenomenon using multiple case studies. Helpful for jointly studying a group of cases in order to inquire into the phenomenon.

Where Do You Find Data for a Case Study?

There are several places to find data for a case study. The key is to gather data from multiple sources to get a complete picture of the case and corroborate facts or findings through triangulation of evidence. Most of this information is likely qualitative (i.e., verbal description rather than measurement), but the psychologist might also collect numerical data.

1. Primary sources

• Interviews – Interviewing key people related to the case to get their perspectives and insights. The interview is an extremely effective procedure for obtaining information about an individual, and it may be used to collect comments from the person’s friends, parents, employer, workmates, and others who have a good knowledge of the person, as well as to obtain facts from the person him or herself.
• Observations – Observing behaviors, interactions, processes, etc., related to the case as they unfold in real-time.
• Documents & Records – Reviewing private documents, diaries, public records, correspondence, meeting minutes, etc., relevant to the case.

2. Secondary sources

• News/Media – News coverage of events related to the case study.
• Academic articles – Journal articles, dissertations etc. that discuss the case.
• Government reports – Official data and records related to the case context.
• Books/films – Books, documentaries or films discussing the case.

3. Archival records

Searching historical archives, museum collections and databases to find relevant documents, visual/audio records related to the case history and context.

Public archives like newspapers, organizational records, photographic collections could all include potentially relevant pieces of information to shed light on attitudes, cultural perspectives, common practices and historical contexts related to psychology.

4. Organizational records

Organizational records offer the advantage of often having large datasets collected over time that can reveal or confirm psychological insights.

Of course, privacy and ethical concerns regarding confidential data must be navigated carefully.

However, with proper protocols, organizational records can provide invaluable context and empirical depth to qualitative case studies exploring the intersection of psychology and organizations.

• Organizational/industrial psychology research : Organizational records like employee surveys, turnover/retention data, policies, incident reports etc. may provide insight into topics like job satisfaction, workplace culture and dynamics, leadership issues, employee behaviors etc.
• Clinical psychology : Therapists/hospitals may grant access to anonymized medical records to study aspects like assessments, diagnoses, treatment plans etc. This could shed light on clinical practices.
• School psychology : Studies could utilize anonymized student records like test scores, grades, disciplinary issues, and counseling referrals to study child development, learning barriers, effectiveness of support programs, and more.

How do I Write a Case Study in Psychology?

Follow specified case study guidelines provided by a journal or your psychology tutor. General components of clinical case studies include: background, symptoms, assessments, diagnosis, treatment, and outcomes. Interpreting the information means the researcher decides what to include or leave out. A good case study should always clarify which information is the factual description and which is an inference or the researcher’s opinion.

1. Introduction

• Provide background on the case context and why it is of interest, presenting background information like demographics, relevant history, and presenting problem.
• Compare briefly to similar published cases if applicable. Clearly state the focus/importance of the case.

2. Case Presentation

• Describe the presenting problem in detail, including symptoms, duration,and impact on daily life.
• Include client demographics like age and gender, information about social relationships, and mental health history.
• Describe all physical, emotional, and/or sensory symptoms reported by the client.
• Use patient quotes to describe the initial complaint verbatim. Follow with full-sentence summaries of relevant history details gathered, including key components that led to a working diagnosis.
• Summarize clinical exam results, namely orthopedic/neurological tests, imaging, lab tests, etc. Note actual results rather than subjective conclusions. Provide images if clearly reproducible/anonymized.
• Clearly state the working diagnosis or clinical impression before transitioning to management.

3. Management and Outcome

• Indicate the total duration of care and number of treatments given over what timeframe. Use specific names/descriptions for any therapies/interventions applied.
• Present the results of the intervention,including any quantitative or qualitative data collected.
• For outcomes, utilize visual analog scales for pain, medication usage logs, etc., if possible. Include patient self-reports of improvement/worsening of symptoms. Note the reason for discharge/end of care.

4. Discussion

• Analyze the case, exploring contributing factors, limitations of the study, and connections to existing research.
• Analyze the effectiveness of the intervention,considering factors like participant adherence, limitations of the study, and potential alternative explanations for the results.
• Identify any questions raised in the case analysis and relate insights to established theories and current research if applicable. Avoid definitive claims about physiological explanations.
• Offer clinical implications, and suggest future research directions.

5. Additional Items

• Thank specific assistants for writing support only. No patient acknowledgments.
• References should directly support any key claims or quotes included.
• Use tables/figures/images only if substantially informative. Include permissions and legends/explanatory notes.
• Provides detailed (rich qualitative) information.
• Provides insight for further research.
• Permitting investigation of otherwise impractical (or unethical) situations.

Case studies allow a researcher to investigate a topic in far more detail than might be possible if they were trying to deal with a large number of research participants (nomothetic approach) with the aim of ‘averaging’.

Because of their in-depth, multi-sided approach, case studies often shed light on aspects of human thinking and behavior that would be unethical or impractical to study in other ways.

Research that only looks into the measurable aspects of human behavior is not likely to give us insights into the subjective dimension of experience, which is important to psychoanalytic and humanistic psychologists.

Case studies are often used in exploratory research. They can help us generate new ideas (that might be tested by other methods). They are an important way of illustrating theories and can help show how different aspects of a person’s life are related to each other.

The method is, therefore, important for psychologists who adopt a holistic point of view (i.e., humanistic psychologists ).

Limitations

• Lacking scientific rigor and providing little basis for generalization of results to the wider population.
• Researchers’ own subjective feelings may influence the case study (researcher bias).
• Difficult to replicate.
• Time-consuming and expensive.
• The volume of data, together with the time restrictions in place, impacted the depth of analysis that was possible within the available resources.

Because a case study deals with only one person/event/group, we can never be sure if the case study investigated is representative of the wider body of “similar” instances. This means the conclusions drawn from a particular case may not be transferable to other settings.

Because case studies are based on the analysis of qualitative (i.e., descriptive) data , a lot depends on the psychologist’s interpretation of the information she has acquired.

This means that there is a lot of scope for Anna O , and it could be that the subjective opinions of the psychologist intrude in the assessment of what the data means.

For example, Freud has been criticized for producing case studies in which the information was sometimes distorted to fit particular behavioral theories (e.g., Little Hans ).

This is also true of Money’s interpretation of the Bruce/Brenda case study (Diamond, 1997) when he ignored evidence that went against his theory.

Breuer, J., & Freud, S. (1895).  Studies on hysteria . Standard Edition 2: London.

Curtiss, S. (1981). Genie: The case of a modern wild child .

Diamond, M., & Sigmundson, K. (1997). Sex Reassignment at Birth: Long-term Review and Clinical Implications. Archives of Pediatrics & Adolescent Medicine , 151(3), 298-304

Freud, S. (1909a). Analysis of a phobia of a five year old boy. In The Pelican Freud Library (1977), Vol 8, Case Histories 1, pages 169-306

Freud, S. (1909b). Bemerkungen über einen Fall von Zwangsneurose (Der “Rattenmann”). Jb. psychoanal. psychopathol. Forsch ., I, p. 357-421; GW, VII, p. 379-463; Notes upon a case of obsessional neurosis, SE , 10: 151-318.

Harlow J. M. (1848). Passage of an iron rod through the head.  Boston Medical and Surgical Journal, 39 , 389–393.

Harlow, J. M. (1868).  Recovery from the Passage of an Iron Bar through the Head .  Publications of the Massachusetts Medical Society. 2  (3), 327-347.

Money, J., & Ehrhardt, A. A. (1972).  Man & Woman, Boy & Girl : The Differentiation and Dimorphism of Gender Identity from Conception to Maturity. Baltimore, Maryland: Johns Hopkins University Press.

Money, J., & Tucker, P. (1975). Sexual signatures: On being a man or a woman.

Further Information

• Case Study Approach
• Case Study Method
• Enhancing the Quality of Case Studies in Health Services Research
• “We do things together” A case study of “couplehood” in dementia
• Using mixed methods for evaluating an integrative approach to cancer care: a case study

Case Studies: How to write a case study

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• How to write a case study
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Structure of a case study

A case study is a type of paper that focuses on a specific problem affecting a population, place, or organization. Examples of subjects in a case study include a person, a group, city, company, department, or event.

The typical structure of a case study includes:

1) Introduction: provides background information about what is being studied. Introduce the topic and describe the problem. Consider the following questions when writing your introduction:

• Who or what is being studied?
• What specific problem you will be focusing on?
• Why is the investigation important in the field?

2) Literature review: provides context for the problem being studied.

• How is the problem or the subject you are investigating described in the literature?
• What is the relationship to other cases?
• What interpretations, gaps, conflicts are identified in the literature?
• How do the ideas of other authors relate to the problem you are investigating?

3) Method: provides details about how the problem is being investigated.

• Provide details about the subject (person, population, organization, etc.) that will be the focus of your study.
• Explain why and how the subject and problem were selected.
• Explain how you collected data to investigate the problem. Examples of possible data collection methods: structure or semi-structured interviews, focus groups, observation, surveys, etc.

4) Discussion: describe your findings.

• Reiterate the research problem and describe the main findings of your research.
• Interpret your findings and how they relate to other studies.
• Provide explanations for the findings, identify gaps and limitations, and suggest future areas of research

5) Conclusion: summarize your findings

• Synthesize the findings and how they are connected to the research problem.
• Emphasize the importance of the study and how they contribute to clarify the research problem.
• Provide recommendations based on your findings; if not done so already, clarify gaps, limitations, alternative explanations, and suggest areas for future research.

This section was based on recommendations provided by :

USC Libraries. (2020, November 1). Organizing your social sciences research paper. https://libguides.usc.edu/writingguide/casestudy

Further reading:

Yin, R. K. (2003). Case study research: Design and methods (3rd ed.). Sage Publications. Call number: H62 .Y56 2003

Cengage Learning. (n.d.). Business resources for students: Case studies. https://college.cengage.com/business/resources/casestudies/students/index.html

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How to Write a Case Study: Definition, Outline, Steps & Examples

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A case study is a research method that involves an in-depth examination of a particular subject, often a person, group, event, or organization. It's used to explore complex issues in real-world contexts. A case study can provide insights that might not be achieved with other research methods.

Are you struggling with writing a case study and don't know where to begin? You are not alone. Most students involved in the Psychology or Sociology field often find this task challenging. Especially if they are new to this research method. However, with the right structure and preparation, creating a case study paper will be a piece of cake. 

After reading this article, you will be armed with all essential details including:

• Definition 
• Case study types
• Basic structure
• Steps on how to write a case study
• Examples that worked.

Let’s dive right in!

What Is a Case Study: Definition

A case study is a research method that involves examining a specific instance to let researchers learn more about an individual, event, organization or concept. It is like a magnifying glass for studying real-life situations. By looking at a single example, we can learn more about complex issues and understand patterns. 

Case studies are used in the fields like Psychology, Business, Statistics or Nursing. As a rule, students apply this research method when writing a dissertation or thesis . 

Depending on the research question and the data needed to address a problem, case studies can involve various research methods.

Research Methods Applied in Case Studies

Case Study Example

A researcher is interested in studying the effects of a newly implemented teaching method on student performance. To find out, they observe a class of 30 students over one semester. The researcher compares the test scores from before and after the method was used, documenting its effectiveness.  The study results showed that academic performance had improved by 11.5% since the new teaching method was implemented. The researcher concluded that this approach works well and can be generalized to a broader population.

Let's recap the main points. 

What Is the Purpose of a Case Study?

The primary purpose of a case study is to gain insight into the real-world situations through the investigation and analysis of a single instance. This research design is often applied to meet such goals: 

• Develop a better understanding of complex issues or phenomena 
• Identify patterns and relationships
• Test hypotheses and theories in natural settings
• Provide practical solutions
• Illustrate best practices or successful strategies.

Every case study writer can customize their work to fit the needs of a specific discipline, as shown below.

Use of Case Studies 

Looking for expert case study help ? Don't hesitate to contact our academic writers today to get the assistance you need. Our team of experts is ready to provide you with top-notch writings to help you achieve your academic or professional goals

Types of Case Studies

There are different types of case studies that scholars or students can bring into play. Each approach has its own focus and is chosen based on research objectives. 

• Descriptive case studies This approach involves a detailed examination of a particular situation or phenomenon to understand it better. Here, researchers see the context, events, and processes that led to a particular outcome, and get a comprehensive picture of the situation.
• Explanatory case studies Explanatory method allows us to understand the "why" and “how” behind a particular event or phenomenon. As the name suggests, this type of case study seeks to test and explain the causal relationship between independent and dependent variables . 
• Exploratory case studies Imagine being a detective and investigating a mystery or problem in its early stages. This is the main idea of an exploratory investigation. It helps to recognize key questions, potential patterns, and areas for further research. It's like peeling back the layers of an onion, revealing new insights and uncovering possible solutions. 
• Intrinsic case studies  Unlike other case study methods, an intrinsic approach is used to explore a unique instance. Here, researchers focus on a particular scenario in its own right, rather than trying to apply the outcomes to a broader population.  
• Instrumental case studies This type of study examines one instance to shed light on a larger group or phenomenon. Instrumental technique is a good choice if you want to develop theoretical frameworks and obtain generalizable findings.
• Cumulative case studies  While conducting cumulative research, students compile and synthesize information from multiple similar instances. Here, you combine the results of multiple studies to draw more generalized conclusions.
• Collective case reports Think of several individual instances being studied together to provide a broader understanding of a specific phenomenon. These instances are often connected by a common theme. This enables researchers to compare and contrast cases and uncover tendencies. 
• Critical case studies Researchers use this method to explore exceptional instances that are particularly interesting or thought-provoking. Critical approach helps to analyze why a specific situation occurred and what could have been done differently.

Case Study Structure: Main Parts

When investigating any phenomenon, it’s important to organize your sections in a logical manner. A structure of a case study usually includes such components:

• Introduction This section is a place to present a case. Provide a brief overview of your instance, introduce your key research objectives and prepare the readers for further analysis.
• Problem identification By laying out a problem, you will be able to show the scope and significance of your topic. Identify the main issue that will be examined and build a clear statement of the problem.
• Background A properly established context sets the stage for research and lays a foundation for case evaluation. Offer relevant background information on the instance. This can be a historical, geographical or cultural context.
• Methodology Describe your  methodology in research  – approach, data collection methods and analysis techniques used in your investigation.
• Solution  Now is the time to determine potential solutions to address the problem, and evaluate the pros and cons of each resolution. Make sure solutions are realistic.
• Results  Once a case study is conducted, you should share your key findings. Mention any data or evidence that was collected and analyzed.
• Discussion This part of a case study is a perfect opportunity for analysis. Discuss the implications of your outcomes and draw conclusions
• Conclusion Summarize your main points, restate a problem and solutions, and offer final recommendations or next steps.

Case Study Outline

Before you create a case study, it’s a good idea to prepare an outline. It serves as a skeleton of your project. A well-structured outline of a case study helps organize your thoughts in a logical manner.

Below you can see an example of a basic template. Feel free to use it for inspiration. 

General Outline  

• Brief subject introduction
• Research purpose and objectives
• Necessary context
• Problem/issue
• Problem significance
• Subject/idea history
• Setting or environment description
• Key challenges, opportunities, or turning points
• Research methods used to gather information
• Data analysis methods
• Possible strategies
• Assessment of solutions
• Recommended solvents
• Major discoveries from the data analysis
• Implications
• Limitations/challenges
• Summary of key points
• Restatement of the problem and solution
• Final suggestions or next steps

Based on the sample template shown above, arrange your key ideas and highlight critical information. You may change the blocks to meet your assignment’s unique requirements.

Before You Start Writing a Case Study

Preparation  is the key to success. To make your case study flawless, you need to establish your goal and plan. This will lay the foundation of the whole process before you begin writing.

Ensure you follow these 3 crucial steps before moving further. 

1. Carefully Read the Instructions 

Your professor may provide you with special requirements, case study rubric or exemplary works. The instructions may include details on preferred format, structure, word count, writing style or analysis techniques. Read given material attentively and make sure you fully understand the guidelines. 

Get expertly crafted works to meet your academic needs. Buy case study from certified professionals and ace your assignments with ease.

2. Conduct Research

Researching is the most time-consuming part of writing a case study. Review relevant studies on the research topic to gain a deeper understanding of your subject. You may want to go through different sources and identify their strengths and limitations. Strive to build a bridge between your case study report and existing gaps. 

Make sure to jot down all your ideas, opinions, notes or questions related to your research. This approach will help you build an outline and write a case study accordingly.  

3. Gather Data

Now you are all set for the data collection process. Identify the most relevant type of information pertinent to your research question.

Consider using primary sources such as interviews, surveys or questionnaires. Secondary resources may include books, articles, case studies and public documents. 

Your data must be accurate and reliable so double-check your research results before integrating them into your project.

How to Write a Case Study in 7 Steps?

Now that you are familiar with the preparation stages, it's time to dive into the writing process. Writing case studies can be challenging. But by following a structured approach, you can produce a clear and engaging work. 

To create a strong project, it's important to carefully plan and execute each step of your flow, from identifying the research question to presenting your conclusions. Below we have prepared detailed guidelines on how to write a case study paper. 

1. Introduce a Case Study

Start your case study introduction by presenting your subject and providing a brief overview of the research objectives. It's important to highlight the significance of your case and explain why it warrants examination. One way to do this is to focus on innovative aspects, such as a novel approach to a problem or a new technology. You can also emphasize the broader implications. 

You should also preview a structure. This will give readers an idea of what to expect. Briefly describe your main points or provide a rough outline. 

Case Study Introduction Example

Post-traumatic stress disorder (PTSD) is a debilitating condition that can arise in individuals who have experienced a traumatic event. In this case study, we examine the experiences of a patient who was diagnosed with PTSD following a car accident. Our analysis focuses on the patient's symptoms, including intrusive thoughts, hyperarousal, and avoidance behaviors. We also explore the treatments employed to manage these symptoms. By analyzing this case, we aim to provide insights into the challenges of treating PTSD and offer recommendations for improving therapeutic interventions for individuals suffering from this condition.

2. Describe a Problem

Before you get to the problem, provide context that explains the issue at hand. Identify the scope and impact of this problem. One efficient strategy of creating case studies that trigger attention is integrating examples or statistics. This helps to understand how severe this situation is. 

Additionally, you may want to highlight any challenges or obstacles that have prevented a problem from being solved. 

Example of Problem Description in a Case Study

John is a 28-year-old man who was involved in a serious car accident three months ago. Since then, he has been experiencing PTSD symptoms, including recurring nightmares, flashbacks, and feelings of anxiety. These symptoms have affected his work performance and relationships with family and friends. Despite seeking help from his primary care physician and attending therapy sessions, John has not experienced significant improvement. The challenge is to identify effective treatments that can help John manage his PTSD and improve his quality of life.

>> Read more: How to Write a Problem Statement

3. Discuss Research Methods 

Research methods you apply will define how to make a case study. There are multiple ways to collect data. So your primary task here is to figure out what kind of information you want to obtain. 

Your research strategy should align with your objectives. For instance, interviews can help capture detailed information from a small sample of people. On the other hand, surveys involve large groups of individuals. If you are using interviews or surveys, provide a list of questions participants were asked. 

You can also do experiments to test out different theories or conduct document analysis to identify trends. 

>> Learn more: What Is Experimental Design  

Example of How to Describe Research Methods 

In this research, both quantitative and qualitative data were utilized. 10 semi-structured interviews were conducted with participants who had experienced PTSD symptoms following a traumatic event. Additionally, data was collected from a survey of 253 individuals who had not been diagnosed with PTSD. We inquired about their experiences with trauma and the types of coping strategies they used to manage stress. Medical records from John's primary care physician were analyzed to track his progress over time. The combination of quantitative and qualitative data allowed for a comprehensive understanding of John's unique experiences with PTSD.

4. Offer Solutions to the Problem 

The next stage involves coming up with potential solutions. Explain what strategies could be used to address the problem.

For example, if you write a case study on a business-related problem, solutions may involve implementing procedures to improve efficiency. Alternatively, in a healthcare niche, you will offer a new medication or therapy.

Be sure to provide evidence from your research or expert opinions to support your suggestions.

Here’s how to do a case study solutions section. 

Example of Solution

One potential solution for addressing John's PTSD symptoms is cognitive-behavioral therapy (CBT). According to a study by Bisson and colleagues (2013), CBT has been found to be effective in reducing symptoms of PTSD in individuals who have experienced traumatic events. The therapist can work with John to identify and challenge negative thought patterns related to his traumatic experience and teach him coping skills to manage his anxiety and stress.

5. Present Your Key Results

Most scholars judge case study reports by research outcomes. You need to show that your solution works. Analyze collected data and share your most significant findings in your results section . This can be an increase in profits or a patient's health improvement. 

When you write your case study outcomes, it is important to organize the information in a clear and concise manner. Use tables, graphs and charts to illustrate your data visually. 

Provide a short summary of your results and their implications. But don’t just tell. You need to back up your research with evidence. If you used interviews, be sure to include any statistical analysis done for those results. 

Example of Case Study Research Results

Our analysis showed that participants who received cognitive-behavioral therapy (CBT) reported a significant decrease in symptoms of post-traumatic stress disorder (PTSD), as compared to those who received no therapy. Specifically, the group who received CBT experienced a 35% reduction in symptoms. Meanwhile, the control group experienced no significant change. These findings suggest that CBT may be an effective treatment option for individuals with PTSD.

6. Conclude with Recommendations

A conclusion of a case study is where you wrap everything up and provide recommendations for further research. Sum up your key points and explain how they could be used to solve similar problems. You can also highlight any unexpected findings or insights that emerged during the study. Don’t forget to discuss any ethical considerations or limitations. 

You need to create a lasting impression. For this, end a case study with a thought-provoking statement or call to action. 

Case Study Conclusion Example

Our research highlighted the significant impact of PTSD on individuals who have experienced a traumatic event. The results suggested that cognitive-behavioral therapy and reprocessing therapy are effective treatments for PTSD. However, more research is needed to determine the long-term effects of these treatments. Additionally, the stigma surrounding mental health and seeking treatment remains a significant barrier to access to care. It is crucial for healthcare professionals and policymakers to address this issue and increase access to mental health services.

7. Proofread Your Case Study

Once you are done with writing a case study, you need to carefully review it. Keep an eye on these things when checking your work: 

• Grammar mistakes Proofread your writing for typos and grammar errors. Feel free to use our  Grammar Checker  to make sure you got everything right.
• Clarity Check whether your work is readable and concise. Avoid long sentences and complex structures.
• Sources accuracy Make sure to check all sources for accuracy. It is also important to ensure that all reported data is up-to-date.
• Citations Ascertain whether all sources are properly cited and the same style is used consistently throughout your paper.

Case Study Format

Besides the content, it is also important to stick to a specific case study paper format. The layout of your paper should follow guidelines of the chosen citation style.

There are different ways to format a case study. Commonly used styles include APA, MLA, Chicago and Harvard. Each format  presents specific requirements for formatting your text and references. 

Check out our detailed guides listed below to learn more about each style. 

>>  How to Write a Paper in APA Format?

>>  How to Do MLA Format?  

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Case Study Examples

Getting actual examples of case studies can be a great way to learn and understand how to write one. To help you out, we have collected several sample case study paper examples for different disciplines. Feel free to use these samples as inspiration when writing your own paper.

Case Study Writing Tips

With the right approach, your effort will reward you with an A+. In this section, we will list some actionable tips on how to write a good case study: 

• Planning your work ahead Planning your work ahead Make sure to create an outline before you start writing and stick to it throughout the entire process.
• Arranging your data logically Break down complex information into chunks and use visual elements (tables, graphs, diagrams) to present it.
• Structuring your writing Use headings and subheadings to organize your content and make key points easy to access.
• Keeping your text simple Write your case study in an easy-to-read language and refrain from complex sentence structures.
• Remaining impartial Be objective in your analysis and avoid personal biases.

Mistakes to Avoid When Writing a Case Study

Even a small mistake can undermine your whole work. Here are some common pitfalls students fail to account for in their case studies:

• Focusing too much on the background Provide enough space for analysis of your problem and solution.
• Stuffing with direct quotes Quotes can be used as evidence in your paper. But relying on them too much will make it sound overly repetitive.
• Not referring to all sources Always cite your sources correctly and use only reliable data in your paper.
• Being vague Avoid general statements and be more specific while discussing your results and solutions.
• Failing to mention possible gaps Always consider ethical considerations or limitations.

Advantages and Disadvantages of Case Study

Using a case study approach as your research method has its own pros and cons. On one hand, it is an effective way to explore a particular issue in detail. On the other, there are certain limitations that come with this approach. Below we will cover both strengths and limitations of case studies.

Benefits of Case Study

A case study is like a seed that can grow into a fruitful tree, providing resolutions to intricate problems. Here are the biggest case study benefits you can use to your advantage:

• In-depth analysis Researchers can gather a lot of information on a specific topic or issue.
• Insights into elaborate issues Allows researchers to examine complex issues in a controlled manner.
• Real-life situations You are able to test theories or hypotheses in real-world settings.
• Comprehensive approach Researchers can collect both quantitative and qualitative data.
• Unique revelations This method can enlight on previously unexplored or understudied areas.

Limitations of Case Study

As with any research method, case studies have their fair share of drawbacks. Let's take a closer look at some of the most prevalent issues that can arise when using this approach.

• Limited generalizability Due to the small sample size and unique nature of each case, it can be difficult to generalize findings to a larger population.
• Observer bias Researchers may bring their own biases and perspectives, which can influence their results and interpretations.
• Time-consuming and expensive This approach requires significant time and resources to conduct, making it less feasible for some research questions.
• Lack of control In contrast to experimental research, case studies lack control over extraneous variables. This can make it difficult to establish cause-and-effect relationships.
• Subjectivity Collected data is often subjective and open to interpretation, which can introduce potential errors.

Case Study Paper Writing Checklist

Before you write a case study assignment, make sure to recap all the information you have learnt today. Refer to this checklist to ensure you are on the right track. 

• checkbox I thoroughly researched my topic and gathered relevant information.
• checkbox A problem/issue is clearly defined. 
• checkbox My case study structure is well-organized. 
• checkbox I used appropriate research methods to gather data.
• checkbox My findings are well-supported by analysis and evidence. 
• checkbox I discussed possible limitations and ethical considerations. 
• checkbox The work offers recommendations for further research.
• checkbox My paper adheres to formatting guidelines required by my instructor.

Bottom Line on How to Write a Case Study

Writing a case study can be an incredibly challenging task for any student. However, with the right approach and tips, you can easily turn this daunting task into a pleasant experience. 

We hope this article helped you understand how to write a case study. Remember to focus on the practical part and avoid overgeneralizing or cherry-picking data.

Our paper writing service is your best choice. We have helped thousands of students with their projects and would be glad to assist you, too. Our team of skilled writers is ready to help you complete your work upon ‘ write my case study ’ request.

Frequently Asked Questions

1. what is a case study in research.

A case study is a research method that involves an in-depth analysis of a particular subject. This approach most often focuses on a single event, person or group. It provides insight into the context of a problem and can be used to explore solutions to intricate issues.

2. What is the difference between a case study and a research paper?

The main difference between a case study and a research paper is in their scope. A case study explores a limited number of subjects, while research papers investigate multiple variables and/or draw conclusions from larger data sets. While both works contain evidence-based information, the focus and approach taken are quite different. Research papers are more general in nature, while case studies focus on narrow problems.

3. How long should a case study be?

The length of a case study varies depending on the type of assignment. Case studies intended for scholarly articles range from 3,000 to 4,0000 words or more. Meanwhile, if it’s a separate chapter in your MA or PhD dissertation, you will need to keep it between 8,000-15,000 words. Follow specific guidelines provided by your professor or institution. 

4. Why is a case study important?

Case studies are an important research tool, as they provide detailed information on a particular issue. By exploring a single instance from multiple angles, researchers can uncover solutions to complicated problems that may not be immediately apparent. Using this method, scientists also test hypotheses and generate new theories.

5. What makes a good case study?

A good case study should be organized, well-researched, and contain evidence. Some characteristics of a case study include:

• Precise subject overview
• Thorough analysis that goes beyond surface-level information
• Examination of a single scenario from various perspectives
• Fact-based arguments
• Validated findings.

6. How to start a case study?

To start a case study, begin by carefully reading requirements and identifying the main problem to be addressed. Don't jump to conclusions or make assumptions – take it one step at a time. Once you have a clear understanding of your goal, gather relevant data. This includes doing research, interviewing people, and analyzing relevant documents.

Joe Eckel is an expert on Dissertations writing. He makes sure that each student gets precious insights on composing A-grade academic writing.

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• Case Studies

Case Study Basics

What is a case study *.

A case study is a snapshot of an organization or an industry wrestling with a dilemma, written to serve a set of pedagogical objectives. Whether raw or cooked , what distinguishes a pedagogical case study from other writing is that it centers on one or more dilemmas. Rather than take in information passively, a case study invites readers to engage the material in the case to solve the problems presented. Whatever the case structure, the best classroom cases all have these attributes: (1)The case discusses issues that allow for a number of different courses of action – the issues discussed are not “no-brainers,” (2) the case makes the management issues as compelling as possible by providing rich background and detail, and (3) the case invites the creative use of analytical management tools.

Case studies are immensely useful as teaching tools and sources of research ideas. They build a reservoir of subject knowledge and help students develop analytical skills. For the faculty, cases provide unparalleled insights into the continually evolving world of management and may inspire further theoretical inquiry.

There are many case formats. A traditional case study presents a management issue or issues calling for resolution and action. It generally breaks off at a decision point with the manager weighing a number of different options. It puts the student in the decision-maker’s shoes and allows the student to understand the stakes involved. In other instances, a case study is more of a forensic exercise. The operations and history of a company or an industry will be presented without reference to a specific dilemma. The instructor will then ask students to comment on how the organization operates, to look for the key success factors, critical relationships, and underlying sources of value. A written case will pre-package appropriate material for students, while an online case may provide a wider variety of topics in a less linear manner.

Choosing Participants for a Case Study

Many organizations cooperate in case studies out of a desire to contribute to management education. They understand the need for management school professors and students to keep current with practice.

Organizations also cooperate in order to gain exposure in management school classrooms. The increased visibility and knowledge about an organization’s operations and culture can lead to subsidiary benefits such as improved recruiting.

Finally, organizations participate because reading a case about their operations and decision making written by a neutral observer can generate useful insights. A case study preserves a moment in time and chronicles an otherwise hidden history. Managers who visit the classroom to view the case discussion generally find the experience invigorating.

The Final Product

Cases are usually written as narratives that take the reader through the events leading to the decision point, including relevant information on the historical, competitive, legal, technical, and political environment facing the organization. A written case study generally runs from 5,000 to 10,000 words of text supplemented with numerous pages of data exhibits. An online raw case may have less original text, but will require students to extract information from multiple original documents, videos of company leaders discussing the challenges, photographs, and links to articles and websites.

The first time a case is taught represents something of a test run. As students react to the material, plan to revise the case to include additional information or to delete data that does not appear useful. If the organization’s managers attend the class, their responses to student comments and questions may suggest some case revisions as well.

The sponsoring professor will generally write a “teaching note” to give other instructors advice on how to structure classroom discussion and useful bits of analysis that can be included to explicate the issues highlighted in the case study.

Finally, one case may inspire another. Either during the case writing process or after a case is done, a second “B” case might be useful to write that outlines what the organization did or that outlines new challenges faced by the organization after the timeframe of the initial case study.

* Portions of this note are adapted from E. Raymond Corey, “Writing Cases and Teaching Notes,” Harvard Business School case 399-077, with updates to reflect Yale School of Management practices for traditional and raw cases.

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• Published: 02 July 2024

Selection of renewable energy development path for sustainable development using a fuzzy MCDM based on cumulative prospect theory: the case of Malaysia

• Taikun Li 1 ,
• Hong Wang 2 &
• Yonghui Lin 3  

Scientific Reports volume  14 , Article number:  15082 ( 2024 ) Cite this article

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Metrics details

• Energy and society
• Environmental social sciences
• Sustainability

Malaysia's excessive energy consumption has led to the depletion of traditional energy reserves such as oil and natural gas. Although Malaysia has implemented multiple policies to achieve sustainable national energy development, the current results are unsatisfactory. As of 2022, only 2% of the country's electricity supply comes from renewable energy, which accounts for less than 30% of the energy structure. Malaysia must ensure energy security and diversified energy supply while ensuring sustainable energy development. This article uses the fuzzy multi-criteria decision-making(MCDM) method based on cumulative prospect theory to help decision-makers choose the most suitable renewable energy for sustainable development in Malaysia from four dimensions of technology, economy, society, and environment. The results show that solar power is the most suitable renewable energy for sustainable development, followed by biomass, wind, and hydropower, but the optimal alternative is sensitive to the prospect parameters. Finally, it was analyzed that efficiency, payback period, employment creation, and carbon dioxide (CO 2 ) emissions are the most critical factors affecting the development of renewable energy in Malaysia under the four dimensions. Reasonable suggestions are proposed from policy review, green finance, public awareness, engineering education, and future energy. This research provides insightful information that can help Malaysian decision-makers scientifically formulate Sustainable development paths for renewable energy, analyze the problems encountered in the current stage of renewable energy development, and provide recommendations for Malaysia's future renewable energy transition and sustainable development.

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Introduction.

The utilization of fossil fuels poses detrimental effects on the environment and generates toxic pollutants. It also harms the ecosystem and releases hazardous gasses, all while its energy source remains unsustainable 1 . It is expected that the world population will reach 9 billion by 2050. In addition, economic growth, technological progress, and environmental degradation are leading to an increasing global demand for renewable energy 2 , 3 . Therefore, sustainable energy (SusE) is crucial for a country's economic and social development, environmental improvement, and improving people's quality of life 4 . Figure  1 shows the world's renewable energy consumption and generation from 2012 to 2022 5 . More and more countries are beginning to realize the role of renewable energy in their economy, environment, and energy transition 6 . Malaysia has been exploring which engine to use to strengthen its sluggish economy in recent years. Renewable energy's enormous economic benefits and sustainable development paths have provided an essential way for Malaysia's economic growth and energy transition. The Malaysian government is increasingly valuing them 7 . With the rapid economic development in recent years, Malaysia is enjoying the benefits of economic growth while also being affected by environmental changes. Figure  2 indicates the carbon dioxide emissions of Malaysia and the world.

Global renewable energy generation and consumption from 2012 to 2022 (source: British Petroleum(BP) Statistical Review of World Energy 2023 5 ).

Global and Malaysian carbon dioxide emissions from 2010 to 2019. (source: World Bank(WB) 16 ).

Comparing the world's total CO 2 emissions, we find Malaysia has not made good progress in control of carbon emissions in recent years 8 . Malaysia still faces significant challenges in achieving stable decarbonization 9 . Solar, biomass, wind, and hydropower are among the abundant renewable resources in Malaysia. Figure  3 depicts the utmost net generating capacity of power plants and other installations that produce electricity from renewable energy sources in Malaysia 10 . As of 2022, Malaysia has produced around 2% of its power from different renewable sources, which falls well short of the original goal of achieving a 20% renewable energy penetration by 2030. Meanwhile, expanding Renewable and Sustainable Energy Sources (RnESs) has become essential to meet energy demand, address climate change, and achieve clean and sustainable development. Selecting the optimal renewable energy source would have positive effects on sustainability in several areas, including social and environmental aspects 11 .

The greatest net generating capacity of power facilities and other renewable energy installations in Malaysia from 2013 to 2022. (source: The International Renewable Energy Agency (IRENA) Capacity Statistics 2023 10 ).

Malaysia has diverse endowments of renewable energy resources. The average annual rainfall in Malaysia is 3549 mm. There are approximately 189 named rivers with a total length of approximately 57,300 kilometers 12 . In recent years, Malaysia's hydropower resources have been exhausted, and the major environmental and social problems caused by hydropower plants have attracted the attention of the government 13 . Although Malaysia lacks wind energy resources, it has 29 longest coastlines in the world, totalling approximately 4,675 km. The offshore wind energy resources are abundant and suitable for developing offshore wind power projects according to their resource characteristics 14 . The average sunshine intensity in Malaysia is 4.21–5.56 kWh/m 2 . Solar energy potential is roughly four times that of fossil fuels 13 . Oil palm is the most significant source of biomass in Malaysia. As the world's second-largest producer of palm oil, the current oil palm plantation area is close to 6 million ha 12 . In this context, Although the Coronavirus Disease 2019 (COVID-19) has caused great damage to all aspects of the economy of Malaysia 15 , the Malaysian government still actively seek sustainable path for renewable energy development.

This article is intended to assist Malaysian policymakers in analyzing the current state of renewable energy in Malaysia, to formulate a scientific and effective renewable energy policy. This article's structure is as follows: Section " Literature review " reviews the relevant literature, focusing primarily on MCDM techniques, cumulative prospect theory, and fuzzy set theory. The evaluation criteria system and renewable energy selection decision model are established, and the decision-making process is elaborated in Section " Research methodology ". Section " A study case in Malaysia " evaluates the types of renewable energy in Malaysia. The final section summarizes and discusses the entire article and provides suggestions for Malaysia's renewable energy policies, which will help Malaysia pursue a low-carbon and sustainable development path.

Literature review

MCDM techniques were extensively employed in selecting renewable energy sources(RPS) 17 . Büyüközkan et al. proposed a novel MCDM approach that integrates Spherical Fuzzy Decision-Making Trial and Evaluation Laboratory (SF-DEMATEL), Spherical Fuzzy Analytic Network Process (SF-ANP), and Spherical Fuzzy Vlse Kriterijumska Optimizacija Kompromisno Resenje (SF-VIKOR) algorithms in a Group Decision Making (GDM) environment. By evaluating wind energy, geothermal energy, solar energy, hydropower, and biogas, it is finally determined that wind and solar energy are the most appropriate energy options for sustainable development in Turkey 18 . Giri et al. have established a criteria system based on society, environment, economy, technology, and politics, including 21 sub-criteria. The study determined that wind energy was India's most optimal energy source, followed by solar and biomass energy, with tidal energy having the lowest value 19 . Nuriyev et al.used four different MCDM methods to make optimal choices for renewable energy transition scenarios in oil and gas-producing countries. The final determination of Azerbaijan's energy planning path is to increase natural gas (NG) moderately, maintain hydro, and increase solar notably and wind moderately 20 . Akpahou et al. evaluated the alternatives using eighteen criteria categorized under the four pillars of sustainability (technical, social, economic, and environmental). Ultimately, it is concluded that solar photovoltaic power generation is the finest energy choice for Benin's government 21 .

Additionally, MCDM techniques have been implemented in other renewable energy sectors, such as efficiency assessment 22 , material supplier selection 23 , and site selection 24 . Scholars combine MCDM techniques with fuzzy set theory.This was called the fuzzy MCDM theory. This theory has been widely used in PRS selection. Sylvester et al. adopted the analytical hierarchy process (AHP) and fuzzy technique for order performance by similarity to the ideal solution (fuzzy TOPSIS) to analyze the influencing factors on the development of renewable energy in Malawi 25 . Ighravwe et al. built a framework that combines the fuzzy entropy method and fuzzy-VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) to rank hybrid renewable energy systems (HRES) simulation software 26 . Nguyen et al. have already developed a fuzzy MCDM model for suitable turbine suppliers in wind power energy projects 27 . Bandira et al. studied the optimal location of solar power plants using the MCDM method 28 . It is significant to apply fuzzy MCDM techniques to RPS selection to control uncertainty.

Classic MCDM techniques typically rely on the expected utility theory, which assumes that decision-makers are entirely rational. However, in complex and diverse environments, decision-makers may face various dangers. Kahneman's prospect theory demonstrated that decision-makers' psychological behaviour exhibits a risk-averse tendency for gains and a risk-seeking tendency for losses 29 . Some individual decision-making theories, such as regret theory, cumulative prospect theory, disappointment theory, and third-generation prospect theory, have begun to develop swiftly based on prospect theory. Among these theories, the cumulative prospect theory best describes the behavioral characteristics of decision-makers. The calculation formula can give the value and weight of the likely result. Therefore, it is considered the most popular theory.

Due to the logical clarity and simplicity of the formulations, the method has been extensively used to solve numerous decision-making problems 30 . Currently, cumulative prospect theory is applied to the decision-making process regarding renewable energy. Zhang et al. evaluated five commercial photovoltaic technologies from a sustainable perspective using a cumulative prospect theory 31 . Zhao et al. used the cumulative prospect theory to select the location of a wind farm in China 32 . Due to the unpredictability and volatility of renewable energy, the decision to utilize it is fraught with significant dangers. Decision-makers frequently exhibit distinct risk preferences, including risk neutrality, risk aversion, and risk pursuing. Decision-makers' varying risk preferences will have a decisive effect on the outcome.

The above research does not consider the risk preference of decision-makers based on traditional fuzzy MCDM. At the same time, it does not consider the deep integration of sustainable development concepts and renewable energy development plans. The above model and viewpoint have not been well applied in Malaysia's renewable energy sustainable development plan. Based on previous research, we propose a fuzzy MCDM model based on cumulative prospect theory, providing scientific guidance for sustainable renewable energy development in Malaysia. The innovation of this article lies in combining fuzzy theory and cumulative prospect theory to evaluate Malaysia's renewable energy from a sustainable development perspective.

Research methodology

Evaluation criteria system.

Establishing a criteria system plays a vital role in RPS selection decision-making. In this section, four main criteria directly related to the sustainability objective were selected for analysis: technical, economic, social, and environmental aspects. These criteria align with the Eleventh Malaysia Plan developed by the Malaysian government. Moreover, sub-criteria associated with each criterion were identified from the scientific databases, including Google Scholar, Web of Science, and Scopus. We finalized 15 criteria after conducting an extensive literature review and consulting with 10 experts. To achieve the goal of this study, we contacted 10 experts from academic institutions, government energy departments, stakeholders, and industries. Table 1 contains the demographic data of the experts. Figure  4 depicts the RPS selection criteria evaluation system. The following are the explanations of the sub-criteria:

Evaluation criteria system for RPS evaluation. ( www.freepik.com Designed by Freepik) .

Technical criterion

Reliability C11 33 , 34 Reliability is the ability of the system to operate as required under specified conditions.

Efficiency C12 35 , 36 Efficiency refers to the level of conversion of natural resources into usable electrical energy.

Maturity C13 35 , 36 Maturity indicates the size of the application range of the technology and whether there is room for improvement.

Resource availability C14 35 The RPS's secure operation is determined by the availability of renewable energy resource (RER) for energy generation.

Economic criterion

Investment Cost (C21) 35 , 37 Investment Cost includes the overall investment from the establishment of the factory to the operation of the equipment, including installation, commissioning, labor, equipment, infrastructure, etc.

O&M cost(C22) 36 , 37 Operations and maintenance cost(O&M cost) represents the operating cost of the factory, which includes parts maintenance costs, worker wages, etc. Compared with traditional energy, renewable energy has lower operating and maintenance costs.

Electricity Cost(C23) 35 , 37 Electricity Cost is the net present value of the lifecycle unit cost of electricity for a generating asset.

Payback period(C24) 35 , 38 The payback period of a renewable energy initiative is the amount of time required for the total return on investment to equal the initial investment.

Market maturity(C25) 37 indicates the overall situation of international market investment in this field.

Social criterion

Social benefits(C31) 35 , 36 By initiating a power initiative, social benefit represents social progress in the local community and region.

Employment creation(C32) 35 , 37 The number of jobs the energy system can provide throughout its life cycle.

Public acceptance (C33) 39 : This criterion pertains to the level of public acceptance of renewable energy (RE), which is acknowledged as a significant factor influencing the adoption of RE technology and the attainment of energy policy objectives. The opinions of the population and pressure groups can significantly impact the time required to complete an energy project, making it of utmost importance.

Environmental criterion

Land requirement(C41) 35 , 37 refers to the land area occupied by renewable energy power plants, which may cause resettlement or affect the surrounding environment and increase additional costs.

Impact on the ecosystem(C42) 13 , 35 This indicator measures the environmental harm caused by the power facility.

CO 2 emission(C43) 13 , 40 The capacity of renewable resources to reduce carbon dioxide emissions.

Renewable energy selection decision model

MCDM is commonly employed in renewable energy management, particularly in energy policy analysis, technology selection, project appraisal, and environmental effect analysis 41 . Considering Malaysia's renewable energy resource endowment, scholars have selected solar, biomass, wind and hydro energy as important alternative options in their research 6 , 13 , 42 , 43 . Numerous studies by scholars have shown that MCDM models could be used to evaluate, compare and rank different renewable energy sources based on a comprehensive set of technical, environmental, economical, and social criteria 37 , 44 , 45 , 46 . The combination of MCDM techniques and fuzzy set theory,named fuzzy MCDM. Currently widely used in the field of renewable energy selection. Due to the high degree of uncertainty in the selection of renewable energy, combining MCDM with fuzzy theory can effectively solve the uncertainty. In different environments, the subjective preferences of decision-makers can affect the final decision results. Therefore, this article adopts the cumulative prospect theory method to describe decision-makers' characteristics in different situations.The decision model is a systematic framework incorporating triangular fuzzy number (TFN), AHP, and cumulative prospect theory.

The data in this study were obtained from literature review and expert evaluation. Refer to Table 4 for specific data sources. The structure comprises two major components: the first part is preparation, and the second part is decision-making. In the preparation phase, alternative, criteria and sub-criteria were obtained through a literature review. Experts select the most appropriate criteria, sub-criteria and renewable energy alternatives. Quantitative and qualitative data were then obtained through literature and report reviews as well as expert evaluations. Divide the obtained raw data into three categories: Crisp Value, Interval Value and Linguistic term, and convert the original data into TFN according to different rules. Then the converted data is normalized. In the decision-making stage, the final ranking of the renewable energy alternatives is calculated based on the formula used in steps 1–6.Fig.  5 describes the preparation and decision-making stages of the theory.

Decision framework of RPS selection.

Alternatives selection and Determining energy types and criteria and sub-criteria

Based on the research results of previous scholars,4 criteria (technical, environmental, economical, and social) and 20 sub-criteria (Reliability et al.) were selected as alternative indicators, and 4 alternative resources (solar, biomass, wind, and hydro energy) were selected. Finally, experts from various fields will select and evaluate the criteria and sub-criteria based on actual situations and work experience while determining four alternative resources. The experts affirmed four criteria and four alternative resources and selected 15 of 20 sub-criteria.

Data collection

Quantitative and qualitative standards need to be used when establishing an evaluation system. Usually, qualitative criteria are obtained from journal literature, websites, reports, etc. Acquiring qualitative criteria requires authoritative experts to evaluate them based on their experience and knowledge 47 . Experts usually use linguistic terms to process qualitative data because language is closer to human thinking 48 . We assume that the linguistic evaluation set is:

Data transformation

In the following manners, we convert crisp values, interval values, and linguistic terms to TFN:

The TFN form of crisp value is three equal values. For instance, the crisp value 5.8 can be converted to the TFN value (5.8, 5.8, 5.8) 46 .

We perform an arithmetic average on the upper and lower limits of the interval value to find the intermediate value of TFN. For instance, the interval value (6,8) can be converted to the TFN value (6,7,8).

This approach relies on linguistic variables represented by TFNs. Table 2 presents the use of the TFNs scale in this investigation. For instance, the term 'Very Low (LV)' can be converted to the TFN (0, 1, 2).

Data normalization

This section needs Eq. ( 1 ) to calculate the normalize the matrix to eradicate the impact of multiple physical variables on the decision-making process.

The decision matrix \({\left[{b}_{ij}\right]}_{m\times n}\) needs are normalized as \({\left[{r}_{ij}\right]}_{m\times n}\) where \(\left( {\tilde{r}_{ij} = r_{{i\underline {j} }} ,r_{ij} ,\overline{r}_{ij} } \right)\) and \({\overline{b} }_{maxj}\) = \(\mathit{max}\left\{{\overline{b} }_{ij}\mid i=\text{1,2}\dots ,m\right\}\) , \({\underline{b}}_{minj}\) = \(\mathit{min}\left\{{\overline{b} }_{ij}\mid i=\text{1,2}\dots ,m\right\}\)

According to the Data transformation rule, sub-criteria values are converted to corresponding TFN. Then determine the sub-criteria attributes. Finally, the data is normalized by Eq. ( 1 ).

Decision-making

Step 1 calculate the pis and nis for every sub-criteria.

First, calculate the defuzzification values of all TFNs in the normalized decision matrix using Eq. ( 2 ), the value of defuzzification S( \(\widetilde{b}\) ) is calculated as follows:

Let \(\widetilde{b}=(\underline{b} ,b,\overline{b })\) be a TFN. Then, for each sub-criteria, sort the TFNs of the alternatives by their defuzzification values. Then, the positive ideal solution (PIS) and the negative ideal solution (NIS) of all options under each sub-criterion, named \({\text{M}}_{j}\) and \({\text{N}}_{j}\) (j = 1,2…,m), can be determined 46 .

Step 2 Determine the gain and loss value

Equation ( 3 ) can be used to calculate the gain or loss values. The gains or losses values can be represented by the distance between alternative and NIS/PIS using Eq. ( 3 ), respectively.

Let \(\widetilde{b}=(\underline{b} ,b,\overline{b })\) and \(\widetilde{c}=(\underline{c} ,c,\overline{c })\) to be TFNs.

Step 3 Calculate the positive and negative prospect value matrixes

According to the obtained gain and loss values, use Eq. ( 4 ) to calculate the positive and negative prospect value matrixes( \({\text{A}}_{\text{ij}}^{+}\) and \({\text{A}}_{\text{ij}}^{-}\) ).

When x ≥ 0 indicates the gains, x < 0 indicates the losses. α and β are exponential parameters associated with gains and losses. We assume that 0 ≤ α ≤ β ≤ 1 49 . λ is the risk aversion parameter, indicating that losses have the characteristic of being steeper than gains, λ > 1 49 . This analysis uses the values α = β = 0.88 for these parameters 49 .

Step 4 Determine the relative weights of criteria and sub-criteria

Utilize the AHP to determine the weight of each indicator based on all criteria and sub-criteria.

Step 5 Calculate the cumulative prospect weights

According to the sub-criteria weight obtained, calculate the cumulative prospect weights \({U}_{{w}_{j}}^{+}\) and \({U}_{{w}_{j}}^{-}\) using Eq. ( 5 ).

where χ and δ represent the attitude coefficient for risk gains and losses, respectively, 0 < χ; δ < 1. Similarly, experiments determine the values of χ and δ to be 0.61 and 0.69, respectively 49 .

Step 6 Calculate and rank the cumulative prospects of each renewable energy system

Compute the comprehensive prospect values for each alternative. Since the prospect value and cumulative prospect weight have been determined, the comprehensive prospect value of each alternative V i can be calculated by Eq. ( 6 ).

A study case in Malaysia

Rps selection in malaysia based on the cumulative proposed approach.

Collecting renewable energy data in Malaysia combines them with relevant expert evaluations. Fill in the quantitative and qualitative criteria in Table 3 - the criteria values and their references and Table 4 - the sub-criteria values and references. Convert the crisp values, interval values, and linguistic terms to TFNs. The transformed matrix is in Table 5 - the transformed decision matrix. Normalize the transformed matrix according to Eq. ( 1 ). Fill in the calculated data in Table 6 - the normalized decision matrix.

Equation ( 2 ) calculates the defuzzification values of all TFNs based on the normalized decision matrix. The PIS and NIS of each alternative under each sub-criteria are then calculated as follows:

M(PIS) = {M1,M2,…,Mm} =  \(\underset{1\le i\le n}{\{\text{max}}\left({\widetilde{r}}_{i1}\right),\underset{1\le i\le n}{\text{max}}\left({\widetilde{r}}_{i2}\right),\dots ,\underset{1\le i\le n}{\text{max}}\left({\widetilde{r}}_{im}\right)\}\) ={(0.80,0.90,1.00),(1.00,1.00,1.00),(0.80,0.90,1.00),(1.00,1.00,1.00),(0.35,0.52,1.00),(0.29,0.44,1.00),(1.00,1.00,1.00),(0.50,0.67,1.00),(0.75,0.88,1.00),(0.80,0.90,1.00),(1.00,1.00,1.00),(0.80,0.90,1.00),(1.00,1.00,1.00), (0.67,0.80,1.00), (0.02,0.03,1.00)}.

N(NIS) = {N1,N2,…,Nm} =  \(\{\underset{1\le i\le n}{\text{min}}\left({\widetilde{r}}_{i1}\right),\underset{1\le i\le n}{\text{min}}\left({\widetilde{r}}_{i2}\right),\dots ,\underset{1\le i\le n}{\text{min}}\left({\widetilde{r}}_{im}\right)\}\) ={(0.40,0.50,0.60),(0.12,0.12,0.12),(0.40,0.50,0.60),(0.09,0.09,0.09),(0.18,0.22,0.30),(0.14,0.16,0.19),(0.07,0.09,0.12),(0.31,0.34,0.38),(0.50,0.63,0.75),(0.00,0.1,0.2),(0.07,0.07,0.07),(0.40,0.50,0.60),(0.00,0.00,0.00),(0.40,0.44,0.50), (0.01,0.02,0.07)}.

Using Eq. ( 3 ), the value of the gains or losses can be depicted by the distance between the alternative and the NIS or PIS. The calculation yields the following result:

After obtaining the gain and loss values, the following positive and negative prospect value matrices \({\text{A}}_{\text{ij}}^{-}\) and \({\text{A}}_{\text{ij}}^{+}\) Are calculated using Eq. ( 4 ).

This article invites experts and scholars from various fields related to renewable energy in Malaysia to evaluate renewable energy based on actual situations. According to the AHP method, we get the weights of criteria (Fig.  6 ) and sub-criteria (Fig.  7 ). The Malaysian renewable energy assessment model shows that economy and technology are the two most important indicators, with weights of 0.41 and 0.29, respectively. The proportion of environmental indicators is higher than social indicators, with weights of 0.19 and 0.11, respectively.

The weights of criteria.

The weights of sub-criteria.

The payback period has become the most important secondary standard in Malaysia's renewable energy generation system, and it is foreseeable that more and more renewable energy investors will shift their focus to whether they can recover their renewable energy investment costs within the contract's validity period. CO 2 emissions have become the most important environmental consideration, consistent with Malaysia's development goal of limiting carbon emissions in the energy sector. From a technical perspective, efficiency is the most critical standard. Compared to other technological indicators, this preference for efficiency indicates risk-taking behavior and acceptance of new technologies. From a social perspective, employment creation is considered a crucial factor.

Calculate the cumulative prospect weights based on the sub-criteria weights and Eq. ( 5 ). The specific results are as follows:

According to the prospect value and cumulative prospect weight, calculate using Eq. ( 6 ). The integrated prospect values of each alternative are ultimately measured as follows:

V 1  = 1.86; V 2  = 0.38; V 3  = 1.49; V 4  = 1.35.

The final RPS ranking is determined as follows: V 1  > V 3  > V 4  > V 2 . Solar power is the superior option, followed by biomass, wind, and hydropower. The study's results confirm the study by Ahmad and Tahar in 2014 13 .

After further research revealed that each RPS performed differently in the four criteria: solar energy has advantages in economics, bioenergy is inclined towards social criteria, and wind power is inclined towards environmental criteria. The technical criteria of hydropower are better than the other three alternative power sources. Figure  8 shows the specific parameters.

Performance of RPS alternatives in relation to criteria.

Sensitivity analysis

Prospect parameters(λ,α,β) largely influence decision-makers' risk tolerance. Therefore, analyzing the above three parameters is necessary to prove whether parameter changes will affect the final result. For the above purpose, we have created three scenarios to analyze the impact of the three prospect parameter changes on the results.

Scenario 1. By altering the value of the parameter λ from 1 to 10.

Scenario 2. By altering the value of the parameter α from 0.1 to 1.

Scenario 3. By altering the value of the parameter β from 0.1 to 1.

The sensitivity analysis results for the three scenarios are depicted in Fig.  9 , Fig.  10 , Fig.  11 . based on the sensitivity analysis graph. We conclude that the ranking results are sensitive to the parameters of β but insensitive to parameters λ and α. The ranking results between 0.1 and 0.24 are modified to be V 4  > V 1  > V 3  > V 2 . While between 0.24 and 0.5, the ranking results are changed to V 1  > V 4  > V 3  > V 2 . When the value exceeds 0.5, the outcome is identical to the conclusion of this article. This implies that the risk parameters will influence the decisions of decision-makers. In this formula, α represents the concavity degree of the gain region of the prospect value function, while β represents the convexity degree of the loss region. Therefore, the greater the values of α and β, the more adventurous decision-makers will choose to be when making decisions. While λ indicates the sensitivity of investors to losses. So, with the decrease of the α or β value, decision-makers tend to be more conservative when faced with risks. From the perspective of decision security, Malaysian policymakers would give more attention to wind power.

Sensitivity analysis in the Scenario of the parameter λ changes.

Sensitivity analysis in the Scenario of the parameter α shifts.

Sensitivity analysis in the Scenario of the parameter β shifts.

Comparative analysis

This section introduces two comparison methods: fuzzy TOPSIS and fuzzy simple additive weighting (SAW). The fuzzy TOPSIS technique to resolve MCDM problems in a fuzzy setting successfully deals with assessment uncertainty. This strategy is based on choosing an alternative closest to the PIS and farthest from the NIS 53 . The Fuzzy SAW technique is commonly used to tackle problems related to fuzzy MCDM 54 . The ultimate score for each choice is determined by multiplying the assigned importance weight for each criterion by the fuzzy value of the alternative on that criterion and then summing the products across all criteria. We may obtain the optimal solution by employing fuzzy TOPSIS and fuzzy SAM by utilising the parameters proposed by Tversky and Kahneman. This approach is equivalent to the recommended method. Table 7 shows the ranking results of three methods.

Conclusion and discussion

This article proposes a fuzzy MCDM technique based on cumulative prospect theory to select Malaysia's best sustainable development path for renewable energy. Firstly, establish a standard system based on the literature review and expert evaluation, which includes 4 criteria and 15 sub-criteria. Secondly, convert qualitative and quantitative information into TFNs. Thirdly, derive the weights of criteria and sub-criteria using the AHP method. Fourthly, considering different risk parameters, use the cumulative prospect theory to choose alternative energy sources. Fifth, take Malaysia's renewable energy as an example to get the renewable energy ranking results. The weight results show that the economic aspect is the most critical criterion. The ranking result shows that solar power is the most suitable development and investment, followed by bioenergy, wind energy, and hydropower. Sixth, a sensitivity analysis is performed on the parameters, and the results show the ranking order is sensitive to the parameters of β. Finally, the correctness of this study was verified through comparative analysis using fuzzy TOPSIS and fuzzy SAW.

The model results showed that payback period and investment cost are the most critical sub-criteria from an economic aspect, while efficiency is from a technical aspect. From the environmental and social perspective, CO 2 emission and employment creation are the highest sub-criteria, respectively. The four sub-standards indicate that strengthening energy transformation to achieve sustainable development of green energy requires evaluating the effectiveness of national renewable energy-related policies, accelerating the introduction of renewable energy technologies, and strengthening financial support for renewable energy projects. At the same time, improving the effectiveness of existing measures to raise public awareness and ultimately enhance the level of knowledge and awareness within the national education system. The ranking results of the model show that solar power is the most suitable development and investment, followed by bioenergy, wind energy, and hydropower.

Malaysia's abundant solar power resources, increasingly mature technologies, and declining solar panel prices make it the most worthwhile renewable energy investment. Considering the current status of renewable energy resources in Malaysia and the international renewable energy development trend, solar power generation has entered the fast lane of rapid development. However, there are uncertainties in the supply of raw materials for biomass. At the same time, Malaysia's abundant biomass reserves and huge power generation potential can effectively solve this problem. Nevertheless, wind energy resources in Malaysia are slightly scarce compared with other resources. Actually, the long coastline and abundant offshore wind energy resources are still worthy of project decision-makers' consideration. Hydropower projects are the areas where investors have the most cooperation with the Malaysian government. In recent years, Malaysia's hydropower resources have gradually dried up, and the resource potential has been exhausted. In this case, investors and the Malaysian government must find new renewable energy alternatives for corporate and economic development, respectively. Sustainable Energy Development Authority Malaysia has offered to host a webinar on the subject of Shaping the Future of the Green Hydrogen Economy on 23 July 2020. Hydrogen has started to receive attention from the government as a new potential renewable energy (RE) in Malaysia.

Future directions and perspectives

The implementation of the Five Fuel Diversification Policy (FDP) in 2000 failed to achieve the intended objective of increasing the adoption of RE. Despite Malaysia's abundant natural and renewable resources, such as solar, hydro, and biomass, there has been no substantial progress in their development for the past twenty years. As of the end of 2022, Malaysia had not adequately diversified its energy sources in accordance with the supply strategy of the National Energy Policy and continued to rely mostly on petroleum. Malaysia should promptly undertake an evaluation of its current renewable energy development procedures to identify any deficiencies and obstacles that may hinder the implementation of these projects.

Further endeavors should be undertaken to establish a comprehensive green financial framework, encompassing provisions for green bonds, green loans, and other forms of finance. This method will be critical in alleviating the substantial financial challenges faced by authorized renewable energy producers. The Sustainable Energy Development Authority is highly qualified to assist in the establishment of such a framework due to its direct comprehension of the difficulties faced by program participants. The Ministry of Energy, Green Technology and Water (MEGTW) should engage in discussions with local financial institutions, private equity funds, and angel investors to find practical solutions for addressing the funding shortages in renewable energy project development.

In order to improve the progress of sustainable development, legislation pertaining to RE and green technologies must effectively tackle many societal concerns. For example, more jobs should be created for the public in order to improve their living standards. Therefore, it is essential to assess and enhance the effectiveness of current public awareness initiatives, which play a vital role in promoting renewable energies and environmentally friendly policies, in order to gain increased public backing for sustainable development.

A further barrier is the lack of advanced technology for the generation of RE and a general ignorance about the benefits of RE. To tackle these difficulties, the Malaysian Centre for Education and Training in RE and Energy Efficiency should raise awareness and knowledge of the nation's educational system. Secondary school and university curricula should incorporate concepts from both RE and energy efficiency(EE). The primary impediments to renewable energy generation are a lack of knowledge of adequate equipment and process operation, inadequate energy management, and limited technology availability.

In order to better safeguard Malaysia's energy demand and security and achieve sustainable energy development as soon as possible, it is necessary to explore future energy sources actively. Malaysia has built a roadmap for a green hydrogen economy by 2025. By 2035, Malaysia should implement the Green Hydrogen initiative alongside the other RE policies and action plans outlined in the roadmap.

Renewable energy has a significant impact on the country's energy transformation and sustainable development. In terms of environmental impact, it decreases greenhouse gas(GHG) pollution, thereby reducing the effects of global change. Sustainable development reduces dependence on finite fossil fuels. In terms of energy security, RE ensures the sustainability of Malaysia’s energy supply by reducing dependence on imported fuel. Furthermore, in terms of economic development, it leverages Malaysia's enormous capacity and establishes a competitive, sustainable energy sector. In terms of society, the development of the renewable energy industry has brought a large number of employment opportunities to the country and provided benefits for residents. At present, the concept of renewable energy in Malaysia is still in its early stages, and the concept of sustainable development is not yet deeply rooted in people's minds. The continuous exploitation of non-renewable energy will have a significant impact on Malaysia's environment and climate change while threatening the global environment and sustainable development. Malaysia needs to continuously strengthen its investment in renewable energy, coordinate various interest groups, and strive to achieve its initial national renewable energy goals by 2030 and achieve net zero emissions by 2050.

Informed consent

Informed consent was obtained from all subjects involved in the study.

Data availability

The data presented in this study are available on request from the corresponding author.

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This research was funded by 1. Science Research Project of Hebei Education Department (grant number ZC2024126 ) . 2. Hebei Province University Innovation and Entrepreneurship Education Teaching Reform Research and Practice Project (grant number 2023cxcy273) . 3. Chengde City Science and Technology Plan Self-funded Project (Second Batch)( grant number 202303A119).

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Li, T., Wang, H. & Lin, Y. Selection of renewable energy development path for sustainable development using a fuzzy MCDM based on cumulative prospect theory: the case of Malaysia. Sci Rep 14 , 15082 (2024). https://doi.org/10.1038/s41598-024-65982-6

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A study on the impact of urbanization level on carbon emissions based on the stirpat model: a case study of five major urban agglomerations in northern china.

1. Introduction

2. literature review.

• To analyze the relationship between carbon emission and urbanization level from the perspective of urban agglomeration so as to enrich the research perspective of the relationship between urbanization and carbon emission and provide a new perspective and method for further discussion in related fields.
• The variables selected by the existing STIRPAT model are supplemented, and analysis and comparison are conducted from the perspective of six urbanization types, aiming to further explore the potential factors affecting carbon emissions in the process of urbanization so as to provide a more comprehensive and in-depth understanding of the complex relationship between urbanization level and carbon emissions of urban agglomerations.

3. Model Analysis

3.1. stirpat model improvement, 3.2. data source, 4. empirical analysis and discussion, 4.1. overall analysis of carbon emissions in urban agglomeration, 4.2. model checking, 4.2.1. stationary analysis, 4.2.2. descriptive statistics, 4.3. regression model, 4.4. regression result discussion, 4.5. regional differences of carbon emission and carbon emission factors in urban agglomerations, 4.5.1. beijing–tianjin–hebei city cluster, 4.5.2. shandong peninsula city cluster, 4.5.3. central and southern liaoning city cluster, 4.5.4. guanzhong plain city cluster, 4.5.5. central plains city cluster, 5. conclusions and suggestion, author contributions, institutional review board statement, informed consent statement, data availability statement, acknowledgments, conflicts of interest.

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Share and Cite

Li, D.; Han, P.; Li, K.; Di, Q.; Duan, Y. A Study on the Impact of Urbanization Level on Carbon Emissions Based on the STIRPAT Model: A Case Study of Five Major Urban Agglomerations in Northern China. Sustainability 2024 , 16 , 6134. https://doi.org/10.3390/su16146134

Li D, Han P, Li K, Di Q, Duan Y. A Study on the Impact of Urbanization Level on Carbon Emissions Based on the STIRPAT Model: A Case Study of Five Major Urban Agglomerations in Northern China. Sustainability . 2024; 16(14):6134. https://doi.org/10.3390/su16146134

Li, Di, Peiyan Han, Kexin Li, Qianbin Di, and Ye Duan. 2024. "A Study on the Impact of Urbanization Level on Carbon Emissions Based on the STIRPAT Model: A Case Study of Five Major Urban Agglomerations in Northern China" Sustainability 16, no. 14: 6134. https://doi.org/10.3390/su16146134

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When a Team Member Speaks Up — and It Doesn’t Go Well

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How the both of you can move beyond counterproductive emotions and use it as an opportunity to build psychological safety.

Speaking up — and being heard — in organizations is critical, but failed attempts to speak up happen often at work and can lead people to silence themselves and others in the long run. Instead, leaders and team members should frame such situations as opportunities to learn. But this isn’t easy; it can be difficult to recognize such moments as learning opportunities; it can be difficult to move beyond counterproductive emotions like shame and blame,;and we tend to be too busy and focused on the short term to learn. The authors’ research and experience have shown that the antidote starts with all team members, including the leader, explicitly framing such interactions as experiments from which everyone expects to learn; preparing for them; paying attention to them; implementing certain process tools; and thinking more long-term about learning.

Elena, a new member of a manufacturing operations team, has identified possible safety improvements. She’s thought about what she wants to say to the team but is nervous about speaking up. Why? She’s wary of her new boss, Raya; she doesn’t want to get off on the wrong foot with her colleagues; and she isn’t absolutely sure her ideas will work across the multiple plants that the team oversees.

• Megan Reitz is an associate fellow at Saïd Business School, University of Oxford, and adjunct professor of leadership and dialogue at Hult International Business School. She is the author of Dialogue in Organizations (2015) and the coauthor of Mind Time (2018), Speak Up (2019), and the second edition of Speak Out, Listen Up (2024). Follow her on LinkedIn or meganreitz.com .
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Our wellness advice is expert-vetted . Our top picks are based on our editors’ independent research, analysis, and hands-on testing. If you buy through our links, we may get a commission. How we test meal kits

This Meal Kit Has the Least Amount of Plastic Waste

Meal kits get a bad rap for being eco-unfriendly, but research shows that's not the case. This service uses less plastic packaging than the others, and it just happens to be our favorite.

A study looked at four popular meal kit services to see which ones produced the most waste.

Meal kits  are convenient and are a good way to eat healthier, but a reptuation for being wasteful keeps some people from trying them. Fair concerns, but research from this  2019 study found meal kits actually cause less food waste, on average, and have a lower overall carbon footprint than provisions bought at the grocery store, with all it's complicated logistics.

To take things further, this  2022 study by US Packaging, a shipping materials company (which CNET confirmed has no business dealings meal kit services) examined four of the most popular meal kits —  Blue Apron , EveryPlate , HelloFresh and Home Chef — to find which service is the least (and most) wasteful.

Blue Apron meal kits have the least waste

Blue Apron , one of the original meal kit services, proved to be the most eco-friendly meal kit, with an impressive 50% of its packaging being fully recyclable, just 1.19 packets per ingredient and the least amount of empty box space. After Blue Apron, there was a steep drop, with HelloFresh (second on the list) using only 9% recyclable materials and super budget-friendly meal kit service EveryPlate finishing in third with similar stats. Home Chef  was the least green meal kit, finishing last out of the four services examined, with 2.38 packets per ingredient and just 19% recyclable materials.

As luck would have it, Blue Apron is also the best overall meal kit we've tested in 2023. Although there are other picks that might suit you better if you eat plant-based , cook for a large group or prefer prepared meals over meal kits. You can read about them all in our list of  best meal delivery services .

Blue Apron meal kits proved to have the least amount of packaging waste. Home Chef lags behind the field with more single-use plastic than the other three.

To analyze the four services, US Packaging and Wrapping ordered three meals from each vendor and employed standardized metrics to evaluate total plastic use, recyclability of materials, number of packets per ingredient and empty box space. The four categories were accounted for in devising a final score for each one.

Blue Apron had the best green score of the four meal kit services analyzed.

Blue Apron trounced the competition, with half of its materials fit for recycling, while no other service broke even 20% in the category. The study found Home Chef's packaging is up to 90% plastic, amounting to 56 packets across the three meals. HelloFresh used the least amount of plastic (just 66%), as meals are mostly separated in large bags and ingredients are not individually packaged.

Some plastic is necessary for meal kits to work, but Home Chef uses more than the average service.

So how does that compare with our experience? We've tested every major meal kit service and also found Blue Apron to be one of the least wasteful — in addition to one of the best — with excellent meals at an affordable price per meal. EveryPlate is our favorite cheap meal kit . While EveryPlate's ice packs aren't recyclable, we didn't notice as much plastic as this study suggests, since EveryPlate sends most of the ingredients loose in a cardboard box and not packaged individually.

Meal kits are more environmentally friendly than you may think

There's no question that  meal kits are convenient . Pick the right meal kit service, and it might  save you some money  over grocery store prices, too. One knock on handy meal kit delivery has always been that it's wasteful since items and ingredients for your dinner are often individually packaged and shipped in cardboard boxes with disposable ice packs. But as this  2019 study shows , meal kits aren't so bad for the environment, after all, and most actually cut down on  food waste  and total carbon footprint versus grocery shopping since ingredients are perfectly portioned with no excess food that could spoil if you don't use it in time.

Want to try a meal kit on for size? Use this sneaky hack and get months of cheap meal delivery and decide which one you like best.

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