Alvarado, Carlos S.2005-10-182005-10-181991-03https://hdl.handle.net/1794/1739p. 036-038This paper consists of a review of the pre-1950s literature discussing the concept of iatrogenesis in relation to hypnosis, multiple personality and trance mediumship. In this literature iatrogenic influence is not limited to a therapist's actions. The concept includes also the effects of groups such as those speculated to exist in circles devoted to trance mediumship. To some extent, discussions about iatrogenesis in this literature reflect power struggles between competing explanatory models of dissociation.242778 bytesapplication/pdfen-USArticle