http://www.webmd.com/mental-health/dissociative-identity-disorder-multiple-personality-disorder Dissociative identity disorder (previously known as multiple personality disorder) is thought to be an effect of severe trauma during early childhood, usually extreme, repetitive physical, sexual, or emotional abuse. What Is Dissociative Identity Disorder? Most of us have experienced mild dissociation, which is like daydreaming or getting lost inContinue Reading