What research term describes an entire category of people that a sample represents?

The first step in the scientific method involves:

posing a question. running an experiment. selecting a group of participants. asking people to participate.

Regarding dissociative identity disorders, which of the following statements is FALSE?

a. A history of heavy drug use as teenagers was found in over 95 percent of persons whose personalities later split into multiple identities. b. The goal of therapy is integration and fusion of the identities into a single, balanced personality. c. Therapy for dissociative identity disorders makes use of hypnosis, which allows contact with the various personality states. d. A majority of psychologists continue to believe that multiple identity is a real, but rare problem.