The presence of at least two distinct personality states within the same person is characteristic of

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The presence of at least two distinct personality states within the same person is a defining feature of dissociative identity disorder (DID), formerly known as multiple personality disorder. Antisocial personality disorder is characterized by a pervasive disregard for the rights of others and a lack of empathy, but not multiple personalities. Dissociative amnesia involves the inability to recall important personal information, usually as a result of traumatic events, but does not involve multiple personalities. Schizophrenia is a severe mental disorder characterized by disruptions in thinking, perception, and emotional responding, but not multiple personalities.

The Presence of at Least Two Distinct Personality States Within