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Over the last decade, multiple personality disorder (MPD) and dissociation have become areas of increasing interest in psychiatry. Once thought to be extremely rare, recent epidemiological studies suggest that up to 10 percent of the general population may suffer from a dissociative disorder including one to three percent with MPD (Ross, 1991). Reports are increasingly common in the scientific literature describing the clinical features and/or therapeutic results with large series of MPD patients (Putnam, 1989, 1991a; Ross, 1989). The Seventh Annual Meeting on Multiple Personality and Dissociative States held in Chicago in November 1990, drew over 700 participants. Currently, there are about a dozen psychiatric hospitals with specialty programs that treat patients with dissociative disorders. The International Society for the Study of Multiple Personality and Dissociation (ISSMP&D) currently has over 2100 members. Dissociation, a journal devoted to the study of dissociation and MPD, is now in its fourth year of publication.