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 Mason. Sybil was published in 1973 and written by Flora Rheta Schreiber about the treatment of Sybil Dorsett (which is a pseudonym for Shirley Ardell Mason) for what is now called dissociative identity disorder (then called multiple personality disorder). She was treated by her psychoanalyst, Cornelia B. Wilbur.