From https://sybilandmpd.blogspot.com used with permission. This blog provides evidence that Sybil did suffer from Multiple Personality Disorder (MPD). This was observed by several sources and people close to Sybil. Shirley (Sybil) verified the book was accurate. Sybil and Multiple Personality Disorder This blog will be about the book “Sybil” and the life of Shirley Ardell … Continue reading Sybil – Proof Sybil had MPD and it was caused by severe trauma