What is dissociative identity disorder? Dissociative identity disorder (DID), formerly known as multiple personality disorder and split personality disorder, is a mental health condition where you have two or more separate identities.
Dissociative identity disorder (DID) is the disorder that was previously recognized as multiple personality disorder. It’s characterized by the presence of two or more dissociated self states, known as alters, that have the ability to take executive control and are associated with some degree of inter-identity amnesia.