Disadvantages of Case Studies

Purpose of Case Studies

Advantage of Case Studies: Understanding Exceptional Individuals

Disadvantage of Case Studies: Researcher Bias

A researcher spends three years living with and documenting the life of a single, isolated individual who has had no contact with modern technology. The researcher's goal is to draw broad conclusions about the fundamental nature of human cognition without technological influence. What is the most significant scientific limitation of using this single-person investigation to achieve this specific goal?

Benefits of Case Studies

Case of Henry Molaison (H.M.)

Case of Anna O.

The Little Albert Experiment

Comparison of Single-Subject Research and Case Studies

Which statement accurately describes the type of data collected in a psychological case study?

A researcher conducts an in-depth, year-long investigation of a single patient with a rare memory disorder. The researcher collects detailed interview transcripts, behavioral observations, and also administers standardized neuropsychological tests that yield numerical scores. Because the study includes these numerical test scores, it no longer qualifies as a case study.

A neuropsychologist is designing a study of a patient who has developed a unique ability to remember every day of their life following a rare type of stroke. Match each specific research activity to the component of the case study method it represents.

Analyze the following research scenarios. Arrange them in order based on how well they align with the unique strengths of the case study method, from the scenario where it is most appropriate (1) to the scenario where it is least appropriate (3).

Imagine you are tasked with developing a new research protocol to study a unique individual who has regained functional sight after 40 years of total blindness. To create a rigorous 'case study' that captures the full depth of this 'rare condition' through an in-depth, longitudinal approach, which of the following combinations of research tools and timelines should you synthesize into your final plan?

Case Study of Anna O.

Limitations of Case Studies

True or False: In psychological research, the case study method is strictly limited to the investigation of single individuals and cannot be used to examine social units or specific events.

Arrange the typical stages of conducting a psychological case study in their logical order, from the initial identification of the subject to the final synthesis of findings.

A researcher conducts an in-depth, longitudinal analysis of a single patient with a rare memory disorder and concludes that a specific memory technique will be effective for all humans. A critic evaluating the scientific merit of this conclusion would argue that the case study method fundamentally lacks _____, which is the extent to which findings can be applied to the broader population.

Match each defining feature of the case study method to its accurate methodological implication for how research using this approach is conducted and interpreted.

A research ethics board is reviewing a proposal to investigate a single individual who, following a specific brain lesion, has completely lost the ability to form any new long-term memories—a condition so rare that fewer than a dozen cases have ever been documented. The proposed study would collect detailed interview transcripts, naturalistic behavioral observations, and standardized memory test scores over a three-year period. A critic argues the study is scientifically worthless because it examines only one person and therefore cannot produce statistically generalizable conclusions. Evaluate this critique: the critic correctly identifies that a _____, by definition, focuses on a single individual or unit and produces findings with limited generalizability; however, this limitation does not render the method scientifically worthless, because its primary purpose is an in-depth, longitudinal description of a subject whose rare condition is inaccessible through large-sample experimental designs.

Define the case study method in psychology as an observational research approach, and identify the primary subjects (e.g., individual, social unit, or event) it can examine, as well as the types of qualitative and quantitative tools typically used to gather information during such a study.

Based on the provided case context, explain how the researchers integrated both qualitative and quantitative observational data in their case study, and explain how this combination aligns with the definition and typical structure of a psychological case study.

Suppose you are designing an in-depth psychological investigation of a small, isolated group that recently survived a rare meteorological event. If you decide to apply the case study method to this scenario, identify what the primary subject of your case study would be, and state one qualitative and one quantitative measurement tool you would use to collect your data.