To understand the unusual behavior of an adult client,a clinical psychologist carefully investigates the client's current life situation and his physical,social-cultural,and educational history. Which research method has the psychologist used?

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The psychologist has used the case study method, which involves in-depth investigation of an individual or a small group. This method is used to understand unusual behavior, and involves the careful examination of a person's current and past life situation, as well as their physical, social-cultural, and educational history. The survey method involves collecting data from a large group of people using standardized questionnaires, while experimentation involves manipulating variables to establish cause-and-effect relationships. Naturalistic observation involves observing people in their natural environment, without manipulating any variables.

To Understand the Unusual Behavior of an Adult Client,a Clinical