I don't have a blurry sense of self-identity.
Once known as multiple personality disorder, dissociative identity disorder was made famous by the book "Sybil" (Independent Pub Group, 1973), which was made into a movie of the same name in 1976. The film and book told the story of Shirley Mason, p... seudonym Sybil, who was diagnosed as having 16 separate personalities as a result of physical and sexual abuse by her mother.
The book and the movie were hits, but the diagnosis soon came under fire. In 1995, psychiatrist Herbert Spiegel, who consulted on Mason's case, told the "New York Review of Books" that he believed Mason's "personalities" were created by her therapist, who — perhaps unwittingly — suggested that Mason's different emotional states were distinct personalities with names. Likewise, critics of the dissociative identity diagnosis argue that the disorder is artificial, perpetuated by well-meaning therapists who convince troubled and suggestible patients that their problems are due to multiple personalities.
Nonetheless, dissociative identity disorder has weathered this criticism and won't undergo any major changes in the DSM-5