1. A case study is a comprehensive analysis of an individual that examines all available information about their life from birth to the present, including social, psychological, biographical, environmental, and vocational factors. 2. Case studies can be conducted on individuals, families, institutions, cultural groups, or entire communities. They are used to better understand an individual's behavior and bring about improved adjustment. 3. Qualified professionals like psychologists, physicians, social workers, and teachers can conduct case studies using formal outlines or informal methods. The goal is to evaluate an individual and select appropriate therapy or treatment.