Multiple personality disorder — now known in modern psychological lingo as dissociative identity disorder (DID) in the DSM-IV — is a fairly uncommon mental health concern. But it remains an intriguing one because of its nature: The presence of two or more distinct identities or personality states. Each of these identities or personality states has its own relatively enduring pattern of perceiving, relating to, and thinking about the environment and self, and take alternating control of the person’s behavior.
Sybil is one of the most popularly known individuals who had multiple personality disorder, largely because of a book published in the 1970s that detailed her experience and that of her psychiatrist in trying to help treat her.
Now Debbie Nathan, writing in her new book, Sybil Exposed, suggests that the core diagnosis for Sybil — of multiple personality disorder — was made up by the patient to keep in the good graces of her psychiatrist.