Month: April 2015

Case Study

A case study is unique in that it can be thought of both as a method, and as a research design, depending on the school of thought to which one subscribes.  Though it is named here as the former, the following explanation is constructed such that it is treated as the latter.  The author understands that a case study consists of multiple methods, but that those methods vary depending on the particular case.  As such, each case study must be carefully designed with several considerations in mind.  Before discussing those considerations, it is helpful to examine the definition of “case study.”

Case Study: A Working Definition

To begin with, case study methodology is inherently constructivist.  In a constructivist approach to any phenomenon, reality is seen as being socially constructed, and relative to an individual’s lived social experience (Baxter and Jack, 2008).  Because a case study “investigates a contemporary phenomenon (the ‘case’) in depth and within its real-world context,” the background and experiences of the case’s key players are an integral part of the case (Yin, 2014, pp. 16-17; Gillham, 2000).  In other words, it is impossible to separate an individual from his or her socially constructed reality.

Second, a case study uses several sources and methods to obtain data about the phenomenon under investigation (Yin, 2014).  In fact, the researcher may not be fully aware of what defines the particular case under study until all sources and methods have been thoroughly examined, and the data triangulated (Ragin and Becker, 1992).   As Masoner (1988) pointed out, “the uniqueness of a case study lies not so much in the methods employed (although these are important) as in the questions asked and their relationship to the end product” (p. 15).

Finally, a case study is flexible.  A case study can (1) be adapted to multiple disciplinary and philosophical perspectives; (2) be used to test or build theory; (3) include either qualitative or quantitative data, or both; and (4) accommodate more than one sampling method (Masoner, 1988).  Further, a case study can be used to examine current, observable phenomena or to reconstruct a particular historical case (George and Bennett, 2005).  A case study may include only one, or a combination, of these features.

Given the five interdependent features, case study is a complex approach.  However, Feagin, Orum, and Sjoberg (1991) provide a good working definition of the case study that demonstrates this complexity while still being succinct: “A case study is here defined as an in-depth, multifaceted investigation, using qualitative research methods, of a single social phenomenon.  The study is conducted in great detail and often relies on the use of several data sources” (p. 2).

Planning and Designing a Case Study

After a working definition has been established, considerations for planning and designing a case study can be explored.  It is important to know when to use a case study, as opposed to another type of method or design.  To this end, Yin (2014) provides some specific guidelines for when a case study might be the optimal design:  a case study is advantageous when “a ‘how’ or ‘why’ question is being asked about a contemporary set of events, over which a researcher has little or no control” (p. 14).  Yin recommends conducting a thorough literature review on the proposed research topic in order to determine what is not yet known about the topic, and to formulate a research question.  Once the question has been formalized, the guidelines above can be used in order to determine whether or not a case study is feasible.

Assuming that a case study is determined to be optimal, the researcher must then carefully design his or her study.  This involves consideration of five key components: “(1) a case study’s questions; (2) its propositions, if any; (3) its unit(s) of analysis; (4) the logic linking the data to the propositions; and (5) the criteria for interpreting the findings” (Yin, 2014, p. 29).  With these components in place, the ideal type and category of case study for the proposed research should begin to emerge.

Categories and Types of Case Studies

            Case studies can be classified by both type and category.  The type of case study refers to its scope: how many individual cases are under study and how many units of analysis are included.  The category of case study refers to the study’s purpose: why the researcher is conducting the investigation.

Categories. There are two main categories of case studies: single-case and multiple-case.  Each of these can then also be either holistic or embedded.  A single-case holistic study would look at a single case and a single unit of analysis.  A single-case embedded study would examine a single case, but have multiple units of analysis.  Similarly, a multiple-case holistic study would look at multiple cases, but only a single unit of analysis for each case.  A multiple-case embedded study would examine multiple cases and multiple units of analysis.  In multiple-case studies, the units of analysis would be the same across sites, or cases.  Single-case studies are appropriate when the case is either “critical, unusual, common, revelatory, or longitudinal” (Yin, 2014, p. 51).  Multiple-case designs are appropriate when the researcher wants to show replication, or make a more compelling case in addressing the research questions (Yin, 2014).           Types. In addition to these categories, there are also five types of case studies: exploratory/evaluative, descriptive/illustrative, explanatory/interpretive, intrinsic, and instrumental.  The type of case study one chooses to conduct depends on the purpose of the study, and on the research questions (Baxter and Jack, 2008).

The first three types of case studies are defined in Yin (2014).  The exploratory, or evaluative, case study is intended to serve primarily as the basis for further research.  This type of study explores a phenomenon in depth in order to elicit research questions of interest.  The descriptive, or illustrative, case study is designed to observe and, subsequently, describe some event or behavior “in its real-world context” (Yin, 2014, p. 238).  Finally, the explanatory, or interpretive, case study seeks to discover causation or correlation.

The other two types of case studies are defined by Stake (1995).  An intrinsic case study is best used when the intention of the researcher is to gain a more complete understanding of the phenomenon in question in that particular case.  An instrumental case study, conversely, should be used when the case itself is not the center of interest, and the focus is not on understanding or even generalizing results.  Instead, it is useful when the researcher is looking for some specific insight or working on refinement of a particular theory.   Once the appropriate category and type of case study have been chosen, data collection methods should be considered.

Data Collection Methods in Case Studies

Case studies are unique in that data collection methods are almost unlimited.  However, not all methods are appropriate for all cases.  The research design and research questions should be carefully considered when determining which methods should be used.  Also, though the case study has historically been primarily qualitative in nature, quantitative methods can be employed in complement to qualitative methods.  For example, a survey can be useful as a starting point for a case study.

Surveys.  A survey can be especially useful as a first step in designing a case study.  A survey is designed to collect general information, under natural conditions, on particular variables for a specific sample.  Ideally, survey samples are chosen such that the information collected can be considered to be generalizable to the larger population (Roberts, 1999).  However, the use of the survey as a starting point for a case study does not need such considerations in design, as the population of the case study is the population of interest, and the purpose of conducting the survey is to uncover topics of interest for further exploration using qualitative methods, such as interviews and observations.

Interviews.  “The qualitative interview is the most common and one of the most important data gathering tools in qualitative research” (Myers and Newman, 2007, p. 3).  Interviews can be structured, semi-structured, or unstructured.  A structured interview follows a very specific set of questions and does not deviate to topics outside of those questions.  A semi-structured interview, on the other hand, consists of a series of open-ended questions with room to move off topic if deemed of interest.  Finally, an unstructured interview often begins with a topic of interest about which the researcher wants further information.  Many times, these unstructured interviews begin with a researcher’s field notes following a period of observation (DiCicco‐Bloom, B. and Crabtree, B. F., 2006).

Observations.  Yin (2014) describes two types of observations: direct and participant.  In direct observation, the researcher positions herself such that she can unobtrusively observe the phenomenon in question, leaving her free to make notes on what she observes.  Notes may be taken freely, or a more structured form may be provided for data collection.  Participant observation, as its name suggests, occurs when the researcher participates in the phenomenon, and may or may not be able to take notes while participating.  Gillham (2000) further describes direct observation as “mainly analytical/categorical” and participant observation as “mainly descriptive/interpretive” (p. 52).  There is, of course, room for overlap between the two.

Textual evidence.  Questioning and observing the participants in a particular case often tells a compelling story, but sometimes additional evidence is needed to corroborate that story or expand it.  This is where documents and archival records can be useful.  Reviewing such textual evidence can help to verify factual information gathered during an interview or observation.  Inferences can also be drawn from certain documents or records and used as indications that there is a need to investigate further.  Finally, textual evidence can be used as a preliminary overview of a particular organization or case (Yin, 2014).

Physical artifacts.  One final method of data collection worth mentioning is the study of physical artifacts.  Though traditionally used primarily in anthropological research, technology and its products (computer code, activity logs, etc.) can be considered physical artifacts and may be relevant to the case under study (Yin, 2014).

Rigor in the Case Study

            The case study has been criticized as a research design for its perceived lack of rigor (Yin 2014).  According to Gibbert, Ruigrok, and Wicki (2008), this concern can be addressed by vigilant attention to study design and careful consideration of the four criteria for establishing rigor, as defined by the positivist tradition: construct validity, internal validity, external validity, and reliability.

Construct Validity. Construct validity refers to the use of appropriate “operational measures for the concepts being studied” (Yin, 2014, p. 46).  Establishing construct validity is particularly challenging because a case study is often exploratory, and operationalization must occur during the course of the study.  For this reason, the researcher must be extra diligent about refraining “from subjective judgments during the periods of research design and data collection” (Riege, 2003, p. 80).  Further measures for increasing construct validity include the following: using a variety of sources to support findings, connecting evidence to form a chain that can be followed logically, and having case study participants review data for inconsistencies and misunderstandings (Riege, 2003; Yin, 2014).

Internal Validity. Internal validity deals with the establishment of causation.  Traditionally, the biggest challenge in establishing internal validity is in ferreting out spurious relationships that do not actually show causation (Yin, 2014).  Case study research, however, is more concerned with establishing the ability to make inferences from the case that will hold up in the general population (Riege, 2003).   Measures for increasing internal validity include pattern matching, explanation building, addressing alternate explanations, and using logic models (Riege, 2003; Yin, 2014).

External Validity. External validity involves the generalizability of research findings, and can be addressed initially by properly constructed research questions.  Specifically, “how” and “why” questions should be included in order to arrive “at an analytic generalization” (Yin, 2014, p. 48).  Other ways to increase external validity are to employ theory in the design of single-case studies, and replication logic in multiple-case studies, as well as to clearly define the scope of the study (Riege, 2003; Yin, 2014).

Reliability. Reliability refers to the ability to repeat research and get the same, or reasonably similar, results.  The concern when dealing with qualitative research is the subjectivity of the researchers.  Ways to circumvent this concern involve keeping detailed records and accounts of the research.  Yin (2014) suggests using a “case study protocol” and developing and maintaining a “case study database” (p. 49).

Questions

1. Design a case study using Yin’s five key components. Be sure to include the rationale for the type and category of case chosen, as well as the methods.
2. Describe appropriate methods of analysis for case study research.
3. Describe the compatibility between information worlds and case study research in the context of a specific research problem. Specify the problem and research questions, then describe how you would use case study and information worlds to approach the research.
4. Choose two examples of case study research in education and/or LIS. Compare, contrast, and critique the studies and describe how you would have approached the case differently, if applicable.

 

 

References

Baxter, P., & Jack, S. (2008). Qualitative case study methodology: Study design and implementation for novice researchers. The Qualitative Report, 13(4), 544-559.  Retrieved from http://nsuworks.nova.edu/tqr/vol13/iss4/2

DiCicco‐Bloom, B., & Crabtree, B. F. (2006). The qualitative research interview. Medical education, 40(4), 314-321.

Eisenhardt, K. M. (1989). Building theories from case study research. The Academy of Management Review, 14(4), 532–550. doi:10.2307/258557

Feagin, J. R., Orum, A. M., & Sjoberg, G. (1991). A Case for the case study. Chapel Hill: University of North Carolina Press.

George, A. L., & Bennett, A. (2005). Case studies and theory development in the social sciences. Cambridge, Mass: MIT Press.

Gerring, J. (2004). What is a case study and what is it good for? The American Political Science Review, 98(2), 341–354.

Gibbert, M., Ruigrok, W., & Wicki, B. (2008). What Passes as a Rigorous Case Study? Strategic Management Journal, 29(13), 1465–1474.

Gillham, B. (2000). Case study research methods. London ; New York: Continuum.

Jaeger, P. T., & Burnett, G. (2010). Information worlds: Social context, technology, and  information behavior in the age of the Internet. New York, NY: Routledge.

Masoner, M. (1988). An audit of the case study method. New York: Praeger.

Merriam, S. B. (1988). Case study research in education : a qualitative approach (1st ed.). San Francisco: Jossey-Bass.

Myers, M. D., & Newman, M. (2007). The qualitative interview in IS research: Examining the craft. Information and organization, 17(1), 2-26.

Ragin, C. C., & Becker, H. S. (Eds.). (1992). What is a case?: exploring the foundations of social inquiry. Cambridge university press.

Riege, A.M. (2003). Validity and reliability tests in case study research: a literature review with “hands‐on” applications for each research phase. Qualitative Market Research: An International Journal, 6(2), 75–86. http://doi.org/10.1108/13522750310470055

Roberts, E. S. (1999). In defence of the survey method: An illustration from a study of user information satisfaction. Accounting & Finance, 39(1), 53-77.

Stake, R. E. (1995). The art of case study research. Thousand Oaks: Sage Publications.

Yin, R. K. (2014). Case study research : design and methods (Fifth edition.). Los Angeles: SAGE.

Ethical issues about qualitative studies especially in this digital era is complex and ambiguous sometimes. Thanks to Tim’s reflection, I reviewed the 2012 report from AoIR (Association of Information Researchers) ethics working committee: Ethical Decision-Making and Internet Research. It is a good supplement to what I learned from Markham’s article about fabrication.

The ethical related decision making is even harder than recalling the ethical principles such as privacy and confidentiality. It seriously intertwines with researchers’ ideological beliefs,  political and academic culture environment (IRB for example), one’s disciplinary assumptions, and one’s methodological approaches. To consider about internet ethnographic research, the first ethical concern is the privacy. For my online forum studies, the posts can be viewed publicly without login information, and thus IRB approval, according to their policy, should not be a big deal.

 

The guidelines provided by the report is quite useful, and I’d like to share with my dear classmates. Although the ambiguous debate keeps on about private/public, human/textual message, and who is human subject, the major concern should be still given to people who are vulnerable.

In practice, following questions need to be kept in mind when conducting relative online research:

1. how is the context conceptualized? what are ethical expectations related to that context?

It is very important that how participants view the venue you are investigating. If it is a closed virtual community with rigorous terms of use, more ethical concerns may be probably expected. By contrast, if encountering public data with no personal information nor stakeholders, less ethical issues need to be in mind.

2. how is the context accessed? how researcher and participants are situated in the context? Is there any need to accommodate to “perceived privacy” in ethical concerns even if it is public data?

3. What are different ethical expectations for participants and researchers in the context?

4. What is the ethical expectation for similar studies you are going to investigate?

5. How data will be securely managed, stored and represented?

6. How are finding presented?

7. Any potential harms nor grades to participants within the group?

8.  How are we recognizing the autonomy of others and acknowledging that they are of equal worth to ourselves and should be treated so?

 

 

 

Last week‘s discussion on ethics was a great reminder (we can never be reminded too much) that research comes with tremendous responsibility. The readings as well as our discussion addressed issues of fabrication, ownership of data, power structures and speaking for others.

I realize that I briefly mentioned this book before but I was recently reminded of it at a Toastmasters meeting and then during our ethics discussion. I think it’s relevant to this week’s topic in several ways… The Immortal Life of Henrietta Lacks is about a woman whose cancerous cells were taken without her or her family’s permission in 1951 at John Hopkins University during a time when patient consent was tenuous. Henrietta Lacks’ cells were the first to indefinitely thrive in culture. HeLa cells led to many medical breakthroughs, including the polio vaccine as well as advances in cancer, Parkinson’s disease, AIDS and much more. Though the HeLa cells spurred billions of dollar in pharmaceutical profit, the Lacks children had no idea of their mother’s contributions to modern science. In fact, many of them suffered from health ailments such as blindness, heart disease and diabetes but were too poor to receive proper care.

Bringing this all back to ethics…The writer, Rebecca Skloot, is a brilliant qualitative researcher who put people first and her project second. She employed archival, ethnographic and intensive interview techniques in order to weave together Henrietta Lacks’ biography, the scientific history of HeLa production (interestingly, the HeLa saga also has roots to Tuskegee University); legal and ethical ramifications; along with the impact on the remaining members of the Lacks family.

Skloot spent 10 years tracing the story. All the while, she treated the family with the respect that they deserved. The Lacks profess that Skloot became a part of their family. I got a chance to see the Lacks family speak at a conference; they continue to have a great relationship with Skloot. The book was also the selection for our campuswide common reading initiative at the small college where I worked. The undergrads enjoyed it…or so they said! At any rate, there was so much room for the endeavor to go wrong, but I believe that Skloot’s work is an example of activist scholarship. All of this ties back to beneficence being fundamental to research.

Ethics is one of those subjects that is interesting to talk about in the hypothetical sense, but once an ethical concern is raised, it can be difficult to work around that concern, which could jeopardize an entire research project.  My ethnographic proposal to work with the oyster harvesters of Apalachicola Bay raises at least of couple of ethical concerns.

The first concern revolves around completely shutting off the Bay to oyster harvesting to allow the oysters to fully replenish. At issue here is the ethicality of denying a person or family the ability to earn a living. Can the Bay justifiably be closed? On one hand, yes, it can, because if it is not, oyster harvesters will only be able to work in the Bay for a short while longer as the oyster population continues to decline. On the other hand, no, it is not ethical to close the Bay due to the potential immediate loss of a large portion of a individual’s or family’s yearly income. Do scientists have the authority to tell harvesters that they can’t earn money off the oysters? Does the state government have the authority to do that?

A second concern revolves around the ethics of leaving the Bay open to oyster harvesting. As mentioned in the previous paragraph, allowing full harvests to be brought to market will likely destroy the oyster population before it can replenish. If the Bay is left open, it could mean that the livelihoods of many more oyster harvesters will be put in jeopardy in a shorter time period. If a small number of harvesters are allowed to bring large oyster catches to market, it removes the possibility for other harvesters to earn money from the oysters. Eventually, few or possibly no harvesters would be able to catch enough oysters to justify the practice of oyster harvesting. Do a small number of oyster harvesters have the right to ruin the livelihoods of other harvesters?

As I work to carry this project into action, these are certainly concerns that will be raised along with a host of other potential ethical issues. However, balancing the immediate loss of personal or family income with the potential destruction of the Bay’s ecology is certainly a prominent concern as this issue is studied and debated.

The Association of Internet Researchers’ ethical guidelines sum up the situation, “ethical conundrums are complex and rarely decided along binary lines.” It is important to note that AoIR uses the term guidelines and not code. It implies that the ground is always shifting and our perception of the internet is not stable.

All content on the internet has been created by a person. Most research involves analyzing text. Many people tend to divorce the written word from the author. This can create some uncomfortable situations if the research is current which means that the person is likely to be alive (possibly why most literary critics wait till the author is dead). A comment on the web is also not seen in the same manner as words in a book. It is more analogous to talking. This is one aspect that is attractive for ethnographic methods. However when something is said in the physical world, it is heard by those around them and then disappears forever. While online communications have the habit of staying around permanently. So when a study is published it can draw attention to a person’s comment and be easily found thus eroding a person’s anonymity or confidentiality.

Another issue is whether the internet is a public or private space. We tend to access the internet individually on our own devices. Mentally we don’t think about the fact that others are looking at the same content simultaneously. When we do think about this we tend to get squeamish. For example the people who created bit.ly had an experiment where everyone viewing a news site was able to see everyone’s mouse pointers and leave comments anywhere on the page in real time. It was a disaster. Many people left quickly and didn’t return while others chased each others’ mouse pointers around and started flame wars. For some reason we don’t like to think of the internet as being a public space but it is one.

I thought the reading about fabricating research has some good ideas on how to protect an individuals anonymity (or confidentiality), as well as, convey an online ethnographic study as taking place in a public space. One strength of qualitative research is that it provides an understanding of personal experience. Is it important that each person is kept separate or is a composite able to convey the same information? I agree that a composite does not take away from our understanding of a situation and may be able to enhance our understanding. I think the objection I was hearing from my class mates stems from the poor word choice of fabrication. One definition of fabrication is to tell lies. Telling lies is the last thing a researcher wants to be accused of doing. But what term would be better? Other building terms such as cobbling, manufacturing, and erecting are not much better. Unfortunately I don’t have a good suggestion.

On a basic level an ethical violation could be seen as any situation were someone (including the researcher) could be harmed by the disclosure of information. The AoIR states that this concept needs to be considered and defined by each researcher and not just seen as institutional hoops to jump through. This reminds me of my freshman year in college when the resident hall adviser would catch me and my friends doing something questionable. He would say, “If you know it’s wrong, then why are you doing it.”

The project I am working on for this class is just chock full of ethical concerns.  Anytime you start a conversation dealing with sexual orientation and/or gender identity, you risk bring up intensely triggering events, particularly when the issue of an individual’s coming out experience is concerned.  Many have dealt with rejection, alienation, and violence in the process of coming out, and the topic must be approached with the highest levels of sensitivity and discretion.  In structuring the research instrument for this project, I made it very clear not only that participation is voluntary (which is standard) but also that there is the option of remaining completely anonymous.  The survey would be administered online without me having met or spoken to the intended participants involved.  If they are willing, they have the option of participating further participation in one-on-one interviews, but even then, they do have the option of email, phone, or face-to-face.  While face-to-face would of course be preferred, phone and especially email offer a way to do the interview without many of the concerns of in-person interviews.  I would not see the participant, and they could, if desired, give a fake name in order to maintain full anonymity.

These precautions and structures are not ideal when trying to gather such information but they are necessary.  Many of the intended participants may not be out to anyone but themselves or a select few friends and were these not in place, there very well may be no participants from which to gather data.  Of course, these issues are not only present with LGBTQ research.  This is true of any population in which the interview, survey, or other data collection method may be triggering.

The ethical considerations in qualitative research are more complex than in quantitative first because of the nature of qualitative research. Last week’s class mentioned qualitative research focuses on the meaning and on the social world as made up of systems of meaning, as well as the interpretative research of cultures and subjectivity rather than measurement. Thus it accepts the intrusion of values into research and does not necessarily aspire to law-like generalities. The ethical problems presented by the nature of qualitative research include but are not limited to:sample sizes are often too small to be useful, and the subjectivity of the researchers means that the objectivity of qualitative studies is sometimes compromised.It is essential for qualitative researchers to explain clearly in proposal and make sure the funding agencies and research ethic committees know that the emphasis in qualitative research is to capture the complexity of the cases in the sample, and to construct descriptions or interpretations or analyses which may have general relevance and value. Qualitative research is openly subjective and does not aim for objectivity in the sense of a culturally neutral vantage point.

The issues arising out of difficulties in assessing impact on the well-being of participants are another reason which makes ethics in qualitative research more complex. Qualitative research is not physically but has the potential to be a more socially and emotionally invasive form of research, so assessing impact on well-being in diverse and complex social situations presents difficulties. Also the unfolding and exploratory nature of qualitative research can leave researches unable to provide full information to participants at the initial at the initial consent consent-seeking stage. We should be aware of that it is not sufficient to establish that there is little risk of physical harm, the degree of personal and social invasiveness needs to be established,such as the shared intimacy of some types of research interview can expose or exacerbate vulnerabilities.

Ethics can be a tricky business.  On the one hand, we have constructed society such that there are certain expectations that everyone understands, for the most part.  On the other hand, there is a lot of ambiguity in certain areas.  For example, the article on fabrication . . . I can understand the need to protect sensitive information and the identities of those who provided that information, but the “by-the-book” rigid ethicist (yes, I made that word up) in me says that it’s not okay because it’s a type of falsification of results.  It’s a real conundrum.  If you follow the linguistic style and maintain the same general content, it follows that fabrication might be okay.  But what if you don’t do such a good job?  I’m not sure of the answer here, but it is definitely food for thought.

The example given in class was also interesting.  I haven’t had a lot of experience with grant writing, but I wonder if constructing the grant with some wiggle room for such occasions is possible.  Of course, in this case, promises were made to the researchers that were not kept, but I’m thinking more generally.  How can we word our funding requests with just enough vagueness to allow for instances such as this one?  Again, food for thought, and something to keep in mind going forward academically.

Case Study

A case study is unique in that it can be thought of both as a method, and as a research design, depending on the school of thought to which one subscribes.  Though it is named here as the former, the following explanation is constructed such that it is treated as the latter.  The author understands that a case study consists of multiple methods, but that those methods vary depending on the particular case.  As such, each case study must be carefully designed with several considerations in mind.  Before discussing those considerations, it is helpful to examine the definition of “case study.”

Case Study: A Working Definition

To begin with, case study methodology is inherently constructivist.  In a constructivist approach to any phenomenon, reality is seen as being socially constructed, and relative to an individual’s lived social experience (Baxter and Jack, 2008).  Because a case study “investigates a contemporary phenomenon (the ‘case’) in depth and within its real-world context,” the background and experiences of the case’s key players are an integral part of the case (Yin, 2014, pp. 16-17; Gillham, 2000).  In other words, it is impossible to separate an individual from his or her socially constructed reality.

Second, a case study uses several sources and methods to obtain data about the phenomenon under investigation (Yin, 2014).  In fact, the researcher may not be fully aware of what defines the particular case under study until all sources and methods have been thoroughly examined, and the data triangulated (Ragin and Becker, 1992).   As Masoner (1988) pointed out, “the uniqueness of a case study lies not so much in the methods employed (although these are important) as in the questions asked and their relationship to the end product” (p. 15).

Finally, a case study is flexible.  A case study can (1) be adapted to multiple disciplinary and philosophical perspectives; (2) be used to test or build theory; (3) include either qualitative or quantitative data, or both; and (4) accommodate more than one sampling method (Masoner, 1988).  Further, a case study can be used to examine current, observable phenomena or to reconstruct a particular historical case (George and Bennett, 2005).  A case study may include only one, or a combination, of these features.

Given the five interdependent features, case study is a complex approach.  However, Feagin, Orum, and Sjoberg (1991) provide a good working definition of the case study that demonstrates this complexity while still being succinct: “A case study is here defined as an in-depth, multifaceted investigation, using qualitative research methods, of a single social phenomenon.  The study is conducted in great detail and often relies on the use of several data sources” (p. 2).

Planning and Designing a Case Study

After a working definition has been established, considerations for planning and designing a case study can be explored.  It is important to know when to use a case study, as opposed to another type of method or design.  To this end, Yin (2014) provides some specific guidelines for when a case study might be the optimal design:  a case study is advantageous when “a ‘how’ or ‘why’ question is being asked about a contemporary set of events, over which a researcher has little or no control” (p. 14).  Yin recommends conducting a thorough literature review on the proposed research topic in order to determine what is not yet known about the topic, and to formulate a research question.  Once the question has been formalized, the guidelines above can be used in order to determine whether or not a case study is feasible.

Assuming that a case study is determined to be optimal, the researcher must then carefully design his or her study.  This involves consideration of five key components: “(1) a case study’s questions; (2) its propositions, if any; (3) its unit(s) of analysis; (4) the logic linking the data to the propositions; and (5) the criteria for interpreting the findings” (Yin, 2014, p. 29).  With these components in place, the ideal type and category of case study for the proposed research should begin to emerge.

Categories and Types of Case Studies

            Case studies can be classified by both type and category.  The type of case study refers to its scope: how many individual cases are under study and how many units of analysis are included.  The category of case study refers to the study’s purpose: why the researcher is conducting the investigation.

Categories. There are two main categories of case studies: single-case and multiple-case.  Each of these can then also be either holistic or embedded.  A single-case holistic study would look at a single case and a single unit of analysis.  A single-case embedded study would examine a single case, but have multiple units of analysis.  Similarly, a multiple-case holistic study would look at multiple cases, but only a single unit of analysis for each case.  A multiple-case embedded study would examine multiple cases and multiple units of analysis.  In multiple-case studies, the units of analysis would be the same across sites, or cases.  Single-case studies are appropriate when the case is either “critical, unusual, common, revelatory, or longitudinal” (Yin, 2014, p. 51).  Multiple-case designs are appropriate when the researcher wants to show replication, or make a more compelling case in addressing the research questions (Yin, 2014).           Types. In addition to these categories, there are also five types of case studies: exploratory/evaluative, descriptive/illustrative, explanatory/interpretive, intrinsic, and instrumental.  The type of case study one chooses to conduct depends on the purpose of the study, and on the research questions (Baxter and Jack, 2008).

The first three types of case studies are defined in Yin (2014).  The exploratory, or evaluative, case study is intended to serve primarily as the basis for further research.  This type of study explores a phenomenon in depth in order to elicit research questions of interest.  The descriptive, or illustrative, case study is designed to observe and, subsequently, describe some event or behavior “in its real-world context” (Yin, 2014, p. 238).  Finally, the explanatory, or interpretive, case study seeks to discover causation or correlation.

The other two types of case studies are defined by Stake (1995).  An intrinsic case study is best used when the intention of the researcher is to gain a more complete understanding of the phenomenon in question in that particular case.  An instrumental case study, conversely, should be used when the case itself is not the center of interest, and the focus is not on understanding or even generalizing results.  Instead, it is useful when the researcher is looking for some specific insight or working on refinement of a particular theory.   Once the appropriate category and type of case study have been chosen, data collection methods should be considered.

Data Collection Methods in Case Studies

Case studies are unique in that data collection methods are almost unlimited.  However, not all methods are appropriate for all cases.  The research design and research questions should be carefully considered when determining which methods should be used.  Also, though the case study has historically been primarily qualitative in nature, quantitative methods can be employed in complement to qualitative methods.  For example, a survey can be useful as a starting point for a case study.

Surveys.  A survey can be especially useful as a first step in designing a case study.  A survey is designed to collect general information, under natural conditions, on particular variables for a specific sample.  Ideally, survey samples are chosen such that the information collected can be considered to be generalizable to the larger population (Roberts, 1999).  However, the use of the survey as a starting point for a case study does not need such considerations in design, as the population of the case study is the population of interest, and the purpose of conducting the survey is to uncover topics of interest for further exploration using qualitative methods, such as interviews and observations.

Interviews.  “The qualitative interview is the most common and one of the most important data gathering tools in qualitative research” (Myers and Newman, 2007, p. 3).  Interviews can be structured, semi-structured, or unstructured.  A structured interview follows a very specific set of questions and does not deviate to topics outside of those questions.  A semi-structured interview, on the other hand, consists of a series of open-ended questions with room to move off topic if deemed of interest.  Finally, an unstructured interview often begins with a topic of interest about which the researcher wants further information.  Many times, these unstructured interviews begin with a researcher’s field notes following a period of observation (DiCicco‐Bloom, B. and Crabtree, B. F., 2006).

Observations.  Yin (2014) describes two types of observations: direct and participant.  In direct observation, the researcher positions herself such that she can unobtrusively observe the phenomenon in question, leaving her free to make notes on what she observes.  Notes may be taken freely, or a more structured form may be provided for data collection.  Participant observation, as its name suggests, occurs when the researcher participates in the phenomenon, and may or may not be able to take notes while participating.  Gillham (2000) further describes direct observation as “mainly analytical/categorical” and participant observation as “mainly descriptive/interpretive” (p. 52).  There is, of course, room for overlap between the two.

Textual evidence.  Questioning and observing the participants in a particular case often tells a compelling story, but sometimes additional evidence is needed to corroborate that story or expand it.  This is where documents and archival records can be useful.  Reviewing such textual evidence can help to verify factual information gathered during an interview or observation.  Inferences can also be drawn from certain documents or records and used as indications that there is a need to investigate further.  Finally, textual evidence can be used as a preliminary overview of a particular organization or case (Yin, 2014).

Physical artifacts.  One final method of data collection worth mentioning is the study of physical artifacts.  Though traditionally used primarily in anthropological research, technology and its products (computer code, activity logs, etc.) can be considered physical artifacts and may be relevant to the case under study (Yin, 2014).

Rigor in the Case Study

            The case study has been criticized as a research design for its perceived lack of rigor (Yin 2014).  According to Gibbert, Ruigrok, and Wicki (2008), this concern can be addressed by vigilant attention to study design and careful consideration of the four criteria for establishing rigor, as defined by the positivist tradition: construct validity, internal validity, external validity, and reliability.

Construct Validity. Construct validity refers to the use of appropriate “operational measures for the concepts being studied” (Yin, 2014, p. 46).  Establishing construct validity is particularly challenging because a case study is often exploratory, and operationalization must occur during the course of the study.  For this reason, the researcher must be extra diligent about refraining “from subjective judgments during the periods of research design and data collection” (Riege, 2003, p. 80).  Further measures for increasing construct validity include the following: using a variety of sources to support findings, connecting evidence to form a chain that can be followed logically, and having case study participants review data for inconsistencies and misunderstandings (Riege, 2003; Yin, 2014).

Internal Validity. Internal validity deals with the establishment of causation.  Traditionally, the biggest challenge in establishing internal validity is in ferreting out spurious relationships that do not actually show causation (Yin, 2014).  Case study research, however, is more concerned with establishing the ability to make inferences from the case that will hold up in the general population (Riege, 2003).   Measures for increasing internal validity include pattern matching, explanation building, addressing alternate explanations, and using logic models (Riege, 2003; Yin, 2014).

External Validity. External validity involves the generalizability of research findings, and can be addressed initially by properly constructed research questions.  Specifically, “how” and “why” questions should be included in order to arrive “at an analytic generalization” (Yin, 2014, p. 48).  Other ways to increase external validity are to employ theory in the design of single-case studies, and replication logic in multiple-case studies, as well as to clearly define the scope of the study (Riege, 2003; Yin, 2014).

Reliability. Reliability refers to the ability to repeat research and get the same, or reasonably similar, results.  The concern when dealing with qualitative research is the subjectivity of the researchers.  Ways to circumvent this concern involve keeping detailed records and accounts of the research.  Yin (2014) suggests using a “case study protocol” and developing and maintaining a “case study database” (p. 49).

Questions

1. Design a case study using Yin’s five key components. Be sure to include the rationale for the type and category of case chosen, as well as the methods.
2. Describe appropriate methods of analysis for case study research.
3. Describe the compatibility between information worlds and case study research in the context of a specific research problem. Specify the problem and research questions, then describe how you would use case study and information worlds to approach the research.
4. Choose two examples of case study research in education and/or LIS. Compare, contrast, and critique the studies and describe how you would have approached the case differently, if applicable.

 

 

References

Baxter, P., & Jack, S. (2008). Qualitative case study methodology: Study design and implementation for novice researchers. The Qualitative Report, 13(4), 544-559.  Retrieved from http://nsuworks.nova.edu/tqr/vol13/iss4/2

DiCicco‐Bloom, B., & Crabtree, B. F. (2006). The qualitative research interview. Medical education, 40(4), 314-321.

Eisenhardt, K. M. (1989). Building theories from case study research. The Academy of Management Review, 14(4), 532–550. doi:10.2307/258557

Feagin, J. R., Orum, A. M., & Sjoberg, G. (1991). A Case for the case study. Chapel Hill: University of North Carolina Press.

George, A. L., & Bennett, A. (2005). Case studies and theory development in the social sciences. Cambridge, Mass: MIT Press.

Gerring, J. (2004). What is a case study and what is it good for? The American Political Science Review, 98(2), 341–354.

Gibbert, M., Ruigrok, W., & Wicki, B. (2008). What Passes as a Rigorous Case Study? Strategic Management Journal, 29(13), 1465–1474.

Gillham, B. (2000). Case study research methods. London ; New York: Continuum.

Jaeger, P. T., & Burnett, G. (2010). Information worlds: Social context, technology, and  information behavior in the age of the Internet. New York, NY: Routledge.

Masoner, M. (1988). An audit of the case study method. New York: Praeger.

Merriam, S. B. (1988). Case study research in education : a qualitative approach (1st ed.). San Francisco: Jossey-Bass.

Myers, M. D., & Newman, M. (2007). The qualitative interview in IS research: Examining the craft. Information and organization, 17(1), 2-26.

Ragin, C. C., & Becker, H. S. (Eds.). (1992). What is a case?: exploring the foundations of social inquiry. Cambridge university press.

Riege, A.M. (2003). Validity and reliability tests in case study research: a literature review with “hands‐on” applications for each research phase. Qualitative Market Research: An International Journal, 6(2), 75–86. http://doi.org/10.1108/13522750310470055

Roberts, E. S. (1999). In defence of the survey method: An illustration from a study of user information satisfaction. Accounting & Finance, 39(1), 53-77.

Stake, R. E. (1995). The art of case study research. Thousand Oaks: Sage Publications.

Yin, R. K. (2014). Case study research : design and methods (Fifth edition.). Los Angeles: SAGE.

This update is about how to apply content analysis to analyze a discussion board of a deaf virtual community: alldeaf.com. A virtual community is the connection between members which is created, maintained, and developed via computers that are connected to networks (Granit & Nathan, 2000). Or groups of people with shared interests who conduct regular, organized interactions online, by means of a common location or mechanism (Ridings, Gefen, & Arinze, 2002). D/deaf and hard of hearing populations particularly, rely more on communication through Internet or online forum. AllDeaf. com is one of the largest virtual community for D/deaf and hard of hearing people. And cochlear implant & hearing aid is one of hottest topic on that forum.

Three research questions are posed for this study:

1. What are the main subjects people are talking about cochlear implant and hearing aids?

2. Does the forum include behaviors that express social support or beyond social support?

3. How Deaf cultural conflict involves into online discussions?

Data for six months will be collected for analysis. Research data were processed by means of content analysis: The messages posted on the forum will be assigned to thematic content categories. A code book needs to be conducted before the formal procedure of content analysis.