Evidence that Dissociative Identity Disorder (Multiple Personality Disorder or MPD) is caused by Childhood Trauma Conclusive evidence that Dissociative Identity Disorder (formerly called Multiple Personality Disorder or MPD) is caused by extensive childhood trauma and not iatrogenically (resulting from the activity of physicians) or socially. Individual identities have been shown to have clear physiological differences. … Continue reading D.I.D. – M.P.D.