Dissociative identity disorder, previously known as Multiple Personality Disorder, is the most severe, chronic manifestation of dissociation. It is characterized by the presence of two or more distinct identities or personality states that will recurrently take control of an individual’s behavior. Personality states, or “alters”, can be imaginary people or even animals. It is important to remember that DID is characterized by identity fragmentation rather than the proliferation of separate personalities (Psychology Today). The personality states can continuously alternate control of the individual’s thoughts and behavior (Identity). Alters frequently manifest through passive influence instead of taking complete executive control (Psychology
