Maia Regman Ms. Magnan Ninth Year Biology Honors 15 April 2014 The Truth about Dissociative Identity Disorder Dissociative Identity Disorder, or previously known as multiple personality disorder, is a mental disorder that has undergone such exploitation that not only do many undermine its validity, but doubt those who are diagnosed with the disorder. Psychiatrics changed the name due to the stigma of the disorder arising from the fictionalization in media.