Once thought of as a rare and mysterious psychiatric curiosity, Dissociative Identity Disorder (DID) is now understood to be a fairly common outcome of severe trauma in young children?most typically extreme and repeated physical, sexual, and/or emotional abuse, and often lack of attachment. Formerly called Multiple Personality Disorder, DID is a condition in which a person has two or more distinct identities or personality states that recurrently take control of the person's consciousness and behavior. Symptoms can include depression, mood swings, panic or anxiety attacks, substance abuse, memory loss, propensity for trances, sleep and eating disorders, distrust, detachment, lack of self-care, and distress or impairment at work.