Although DID (Dissociative Identity Disorder), formerly known as "multiple personality disorder," is very rare, SYBIL is a movie worth watching. It is a good look into the way a brain may do-what-it-needs-to-do to cope. Of course, DID is one extreme end of a very long spectrum, but it helps in the understanding of the other end as well.
If you have any questions or comments, we’d love to hear from you. Your feedback is always appreciated!