Сибил: История множественной личности и сомнения в диагнозе.

1973 book by Flora Rheta Schreiber
the non fiction book about Shirley Ardell Mason's treatment for dissociative identity disorder

Sybil is a 1973 book by Flora Rheta Schreiber about the treatment of Sybil Dorsett (a pseudonym for Shirley Ardell Mason) for dissociative identity disorder (then referred to as multiple personality disorder) by her psychoanalyst, Cornelia B. Wilbur. The book was made into two television movies of the same name, once in 1976 and again in 2007. There have also been books published after the fact, challenging the facts of Sybil's therapy sessions. A few examples of these are SYBIL in her own words, Sybil Exposed, and After Sybil.

Mason is given the pseudonym "Sybil" by her therapist to protect her privacy. In 1998, Sigmund Freud historian Peter J. Swales discovered Sybil's true identity. Originally in treatment for social anxiety and memory loss, after extended therapy involving amobarbital and hypnosis interviews, Sybil manifests sixteen personalities. Wilbur encouraged Sybil's various selves to communicate and reveal information about her life. Wilbur writes that Sybil's multiple personality disorder was a result of the severe physical and sexual abuse she allegedly suffered at the hands of her mother, Hattie.

The book had an initial print run of 400,000. The book is believed by Mark Pendergrast and Joan Acocella to have established the template for the later upsurge in the diagnoses of dissociative identity disorders. Audiotapes of recorded conversations between Schreiber and Wilbur were examined by Herbert Spiegel and later by academic Robert W. Rieber of John Jay College of Criminal Justice. Both concluded that Wilbur suggested multiple personalities to her client, whom they saw as a simple "hysteric". Their purported proof of this claim is a session tape in which Wilbur is heard describing to Mason the personalities she has already seen Mason exhibit. Spiegel and Rieber also claim that Wilbur and Schreiber fabricated most of the book. Many details of the real case were changed or removed to protect Mason's privacy. Critics of Spiegel and Rieber's "revelation" ask why they waited until after Schreiber, Wilbur, and Mason were all dead before revealing the tapes, which Spiegel supposedly had in his possession all along. A review of Rieber's book Bifurcation of the Self by Mark Lawrence states that Rieber repeatedly distorted the evidence and left out a number of important facts about Mason's case, in order to advance his case against the validity of the diagnosis. Patrick Suraci, author of SYBIL in her own words, personally acquainted with Shirley Mason and still in touch with members of her family, criticizes Spiegel for what he terms unethical behavior in withholding the tapes. Spiegel also claimed to have made films of himself hypnotizing Mason, supposedly proving that Wilbur had "implanted false memories" in her mind, but when Suraci asked to see the films, Spiegel said he had lost them. Wilbur's psychiatric files were destroyed upon her death. In 2011, journalist Debbie Nathan published a detailed exposé, Sybil Exposed, in which she claims that Wilbur, Mason and Schreiber knowingly perpetrated a fraud in order to create a "Sybil, Inc." business, selling T shirts, stickers, board games and other paraphernalia. Much of Nathan's book repeats material already covered in the original Sybil, including a 1958 letter in which Mason spoke about making up the "alters" for attention and excitement. In Sybil, this letter was interpreted as an attempt to put difficult, painful therapy on hold. Nathan claims Schreiber became aware of Mason and her alleged past, writing Sybil based on stories coaxed from her during therapy, and that this case created an "industry" of repressed memory. In 2013, artist journalist Nancy Preston published After Sybil, a personal memoir which includes facsimile reproductions of Mason's personal letters to her, along with color plates of her paintings. According to Preston, Mason taught art at Ohio's Rio Grande College, where Preston was a student. The two became close friends and corresponded until a few days before Mason's death. In the letters, Mason confirmed that she had had multiple personalities.

In computer security, a Sybil attack is one wherein a reputation system is subverted by creating multiple identities.