A case study is an in-depth study of one person, group, or event. In a case study, nearly every aspect of the subject's life and history is analyzed to seek patterns and causes of behavior. Case studies can be used in a variety of fields including psychology, medicine, education, anthropology, political science, and social work. The hope is that learning gained from studying one case can be generalized to many others. Unfortunately, case studies tend to be highly subjective and it is sometimes difficult to generalize results to a larger population. While case studies focus on a single individual or group, they follow a format that is similar to other types of psychology writing. If you are writing a case study, it is important to follow the rules of APA format.

Benefits and Limitations

· A case study can have both strengths and weaknesses. Researchers must consider these pros and cons before deciding if this type of study is appropriate for their needs.

· One of the greatest advantages of a case study is that it allows researchers to investigate things that are often difficult to impossible to replicate in a lab. Some other benefits of a case study:

· Allows researchers to collect a great deal of information

· Give researchers the chance to collect information on rare or unusual cases

· Allows researchers to develop hypotheses that can be explored in experimental

· Cannot necessarily be generalized to the larger population

· Cannot demonstrate cause and effect

· May not be scientifically rigorous can lead to bias

· Researchers may choose to perform a case study if they are interested in exploring a unique or recently discovered phenomenon. The insights gained from such research can then help the researchers develop additional ideas and study questions that might then be explored in future studies

Types

There are a few different types of case studies that psychologists and other researchers might utilize

Collective case studies

These involve studying a group of individuals. Researchers might study a group of people in a certain setting or look at an entire community of people.

Descriptive case studies

These involve starting with a descriptive theory. The subjects are then observed and the information gathered is compared to the pre-existing theory.

Explanatory case studies

These are often used to do causal investigations. In other words, researchers are interested in looking at factors that may have actually caused certain things to occur.

Exploratory case studies

These are sometimes used as a prelude to further, more in- depth research. This allows researchers to gather more information before developing their research questions and hypothesis

Instrumental case studies

These occur when the individual or group allows researchers to understand more than what is initially obvious to observers.

Intrinsic case studies

This type of case study is when the researcher has a personal interest in the case. Jean Piaget's observations of his own children are good examples of how an intrinsic cast study can contribute to the development of a psychological theory.