Which type of research method involves the in-depth study of an individual or small group?

• A. Survey
• B. Case Study
• C. Experiment
• D. Longitudinal Study

Answer: (B)

The in-depth study of an individual or small group is best represented by a case study. This research method allows for a comprehensive examination of the subject's background, behavior, and context over time, providing rich qualitative data that can give insights into complex issues. Case studies are particularly valuable in psychology and social sciences because they can highlight unique situations or rare phenomena that might not be captured in larger studies or more quantitative research methods.

Unlike surveys, which gather data from larger populations through questionnaires, case studies focus specifically on an individual or a small group, allowing for deeper analysis. Experiments involve manipulating variables to establish cause-and-effect relationships, and therefore are more structured than the narrative nature of case studies. Longitudinal studies, while also focused on groups, track changes over time rather than providing an immediate in-depth portrayal of a specific individual or small group. Overall, the intricacy and detail captured by case studies make them particularly suited for exploring individual or small group experiences.