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The most chronic and complex of the dissociative disorders, multiple personality disorder, was renamed multiple personality disorder, was renamed 'dissociative identity disorder' in 1994 in DSM-IV (American Psychiatric Association). The rationale for the name change, was among other things, to clarify that there are not literally separate personalities in a person with dissociative identity disorder; 'personalities' was a historical term for the fragmented identity states that characterize the condition.