Trying to Understand Dissassociative Identity Dissorder Dissociative identity disorder, more commonly known as multiple personality disorder, is one of the most intriguing and least understood of mental disorders. The publication of Sybil in 1973 created a wave of public fascination and, more importantly, professional recognition of childhood physical and sexual abuse as precipitants of the disorder. Dissociative identity disorder is characterized by the presence of "...at least two separate