The DID patient is a single person who experiences himself or herself as having separate alternate identities that have relative psychological autonomy from one another. At various times, these subjective identities may take executive control of the person’s body and behavior and/or influence his or her experience and behavior from “within.” Taken together, all of the alternate identities make up the identity or personality of the human being with DID.- Guidelines for Treating Dissociative Identity Disorder in Adults, Third Revision, p7