For which method might a researcher employ a number of techniques such as interviews,direct observations,and psychological testing

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Case studies typically involve in-depth analyses of a single individual, group, or phenomenon, and therefore require a variety of research techniques in order to triangulate and verify findings. The researcher might use interviews to gather subjective accounts of the person's thoughts, feelings, and behaviors; direct observations to record actual behaviors in real-world settings; and psychological testing to measure cognitive abilities, personality traits, or other psychological constructs. In contrast, surveys typically use a standardized set of questions to gather data from large groups of people, while naturalistic observation is a type of research design that seeks to observe behavior in its natural setting without any manipulation or intervention. Correlation studies, meanwhile, focus on exploring the relationship between two or more variables, and may involve statistical analyses but typically do not require the use of various research techniques like a case study would.

For Which Method Might a Researcher Employ a Number of Techniques