Pop Quiz: What is the Cause of Dissociative Identity Disorder?

Dissociative Identity Disorder (DID) is a severe psychological disorder. It was known in the past as Multiple Personality Disorder, but that term is no longer recognized in the Diagnostic and Statistical Manual of Mental Disorders - Fifth Edition (DSM-V). The cause of DID is having experienced major trauma. Examples of such trauma include short- or long-term severe abuse, surviving a natural disaster, and other extremely distressing life events.