The interface between multiple personality, spirit mediumship, and hypnosis.

In this paper I draw parallels between multiple personality, spirit mediumship, and hypnosis from historical, anthropological, and clinical perspectives. I emphasize Milton H. Erickson's view of multiple personalities as not necessarily pathological but as potential resources. He employed hypnosis to gain access to personalities and to transform their behavior from involuntary to voluntary actions. I discuss similarities between this view and the use of spirits as a resource with mediums. Natural trance therapies in other cultures offer a new perspective for viewing the normalcy or pathology of "other selves."