Shirley Mason was the psychiatric patient whose life was portrayed in the 1973 book Sybil. The book and subsequent film caused an enormous spike in reported cases of multiple personality disorder.

MINNEAPOLIS - Was one of the world's most famous medical cases a mistake? Or, worse yet, a hoax? Author Debbie Nathan's book "Sybil Exposed" explores the history of the Minnesota woman who became a ...

My wife and I are having a disagreement on whether multiple personality disorder is real or not. She works in a substance abuse clinic and says she sees people with this disorder quite often. I on the ...