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.

Have you ever felt like there are different versions of you living inside your mind, each with its own thoughts, feelings, and even memories? This feeling can be more than just an expression of having ...

When Sybil first came out in 1973, not only did it shoot to the top of the best-seller lists — it manufactured a psychiatric phenomenon. The book was billed as the true story of a woman who suffered ...

When you think about multiple personalities, what is the first thing that comes to your mind? For many, it is a disturbing picture of a Hollywood film highlighting a deranged and sociopathic murderer.

A serial rapist's attempt to claim insanity based on multiple personality disorder fell flat in Texas, as a judge ordered the expert's trial testimony stricken from the record as junk science.