Abstract
The literature offers little credible information concerning possible detrimental effects of experimental hypnosis, although it is replete with dogmatic and opinionated denunciations founded on outworn and untenable concepts of the phenomenon. Theoretical possibilities of detrimental effects are development of hypersuggestibility, alteration of personality, weakening of the subject's perceptual powers in regard to reality and unreality, and the development of unhealthy mental attitudes and escape mechanisms. The literature is barren of controlled experimental investigation of these problems. The author's own experience reveals no evidence of such harmful effects. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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