Advantages Of Using A Case Study Approach

Reading different blogs it has come to my attention that case studies are getting quite a bad reputation. They are being deemed non-scientific and of questionable usefulness. In this blog I will look at both sides of the argument for case studies and see whether as a design it is still useful for the field of psychology.

Advantages

  • Case studies allow a lot of detail to be collected that would not normally be easily obtained by other research designs. The data collected is normally a lot richer and of greater depth than can be found through other experimental designs.
  • Case studies tend to be conducted on rare cases where large samples of similar participants are not available. An example of this is the study of Phineas Gage by Harlow, J.M. This example also connects with the point above with the depth of data obtained. Cases of brain damage are quite minimal and it is extremely rare to find people with the exact same parts of the brain affected. To be able to gain knowledge of brain functions the damage between people have to be exact to ensure you are testing the right thing, this can generally only be done through case studies.
  • Within the case study, scientific experiments can be conducted.
  • Case studies can help experimenters adapt ideas and produce novel hypotheses which can be used for later testing.
  • Knowledge! Again to Phineas Gage, his contributions to neuropsychology and the workings of the brain are invaluable.

 

Disadvantages

 

  • One of the main criticisms is that the data collected cannot necessarily be generalised to the wider population. This leads to data being collected over longitudinal case studies not always being relevant or particularly useful.
  • Some case studies are not scientific. Freud used case studies for many of his theories or studies. Such examples are that of Anna O and Little Hans. Both of these are not scientific nor are they able to be generalised. This can be attributed to them being case studies, but also Freudian theory in general.
  • Case studies are generally on one person, but there also tends to only be one experimenter collecting the data. This can lead to bias in data collection, which can influence results more than in different designs.
  • It is also very difficult to draw a definite cause/effect from case studies.

 

Case studies also tend to collect mainly qualitative data. I have put this as neither an advantage or disadvantage of case studies, as this depends on your stance on qualitative data. If you look back a few blogs I have summarised my view of qualitative data. Mainly positive!

Overall, I think that case studies are an important and useful method of data collection, especially in cases of rare phenomena. It would be extremely unethical to go taking parts of peoples brains out just to make a larger sample size to use a different experimental design method. However, as data is collected on new cases I think it is important to always refer back to previous data in order to build on existing knowledge and ensure findings are as applicable to real life as possible.

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Published in Method, Research Students by Mark Murphy on May 24, 2014

(c) Joe Duty

There should be no doubt that with case studies what you gain in depth you lose in breadth – this is the unavoidable compromise that needs to be understood from the beginning of the research process. So this is neither an advantage nor a disadvantage as one aspect cancels out the benefits/drawbacks of the other – there are other benefits and drawbacks that need attention however …

Benefits

  • Their flexibility: case studies are popular for a number of reasons, one being that they can be conducted at various points in the research process. Researchers are known to favour them as a way to develop ideas for more extensive research in the future – pilot studies often take the form of case studies. They are also effective conduits for a broad range of research methods; in that sense they are non-prejudicial against any particular type of research – focus groups are just as welcome in case study research as are questionnaires or participant observation.
  • Capturing reality: One of their key benefits is their ability to capture what Hodkinson and Hodkinson call ‘lived reality’ (2001: 3). As they put it, case studies have the potential, when applied successfully, to ‘retain more of the “noise” of real life than many other types of research’ (Hodkinson and Hodkinson, 2001: 3). The importance of ‘noise’ and its place in research is especially important in contexts such as education, for example in schools where background noise is unavoidable. Educational contexts are always complex, and as a result it is difficult to exclude other unwanted variables, ‘some of which may only have real significance for one of their students’ (Hodkinson and Hodkinson, 2001, 4).

Drawbacks

  • The challenge of generality: At the same time, given their specificity, care needs to be taken when attempting to generalise from the findings. While there’s no inherent flaw in case study design that precludes its broader application, it is preferable that researchers choose their case study sites carefully, while also basing their analysis within existing research findings that have been generated via other research designs. No design is infallible but so often has the claim against case studies been made, that some of the criticism (unwarranted and unfair in many cases) has stuck.
  • Suspicion of amateurism: Less partisan researchers might wonder whether the case study offers the time and finance-strapped researcher a convenient and pragmatic source of data, providing findings and recommendations that, given the nature of case studies, can neither be confirmed nor denied, in terms of utility or veracity. Who is to say that case studies offer anything more than a story to tell, and nothing more than that?
  • But alongside this suspicion is another more insiduous one – a notion that ‘stories’ are not what social science research is about. This can be a concern for those who favour  case study research, as the political consequences can be hard to ignore. That said, so much research is based either on peoples’ lives or the impact of other issues (poverty, institutional policy) on their lives, so the stories of what actually occurs in their lives or in professional environments tend to be an invaluable source of evidence. The fact is that stories (individual, collective, institutional) have a vital role to play in the world of research. And to play the specific v. general card against case study design suggests a tendency towards forms of research fundamentalism as opposed to any kind of rational and objective take on case study’s strengths and limitations.
  • Preciousness: Having said that, researchers should not fall into the trap (surprising how often this happens) of assuming that case study data speaks for itself – rarely is this ever the case, an assumption that is as patronising to research subjects as it is false. The role of the researcher is both to describe social phenomena and also to explain – i.e., interpret. Without interpretation the research findings lack meaningful presentation – they present themselves as fact when of course the reality of ‘facts’ is one of the reasons why such research is carried out.
  • Conflation of political/research objectives: Another trap that case study researchers sometimes fall into is presenting research findings as if they were self-evidently true, as if the stories were beyond criticism. This is often accompanied by a vague attachment to the notion that research is a political process – one that is performed as a form of liberation against for example policies that seek to ignore the stories of those who ‘suffer’ at the hands of overbearing political or economic imperatives. Case study design should not be viewed as a mechanism for providing a ‘local’ bulwark against the ‘global’ – bur rather as a mechanism for checking the veracity of universalist claims (at least one of its objectives). The valorisation of particularism can only get you so far in social research.
[This post is adapted from material in ‘Research and Education’ (Curtis, Murphy and Shields, Routledge 2014), pp. 80-82].

Reference: Hodkinson, P. and H. Hodkinson (2001). The strengths and limitations of case study research.Paper presented to the Learning and Skills Development Agency conference, Making an impact on policy and practice, Cambridge, 5-7 December 2001, downloaded from http://education.exeter.ac.uk/tlc/docs/publications/LE_PH_PUB_05.12.01.rtf.26.01.2013

About

Mark Murphy

Mark Murphy is a Reader in Education and Public Policy at the University of Glasgow. He previously worked as an academic at King’s College, London, University of Chester, University of Stirling, National University of Ireland, Maynooth, University College Dublin and Northern Illinois University. Mark is an active researcher in the fields of education and public policy. His research interests include educational sociology, critical theory, accountability in higher education, and public sector reform.

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