Psychopathological effects of hypnosis

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Abstract
The probability that hypnotic induction produces psycho-pathological effects has not been experimentally determined. The present study hypothesizes various negative effects following hypnosis such as increased signs of personality disturbances, increased need for medical attention, greater tendencies toward suicide, and negative effects among the more maladjusted persons of the population sample. 207 college students were assigned at random to experimental and control groups. The experimental group was hypnotized 3 times in successive weeks. A comparison between control and experimental groups in respect to pre- and post-MMPI score differences plus a follow-up with the college counseling center and infirmary for a 90-day period following induction led to the rejection of the hypotheses. A comparison of measures yielded some significant differences in favor of the experimental group. It is concluded that there are nondetrimental effects when hypnosis is used with a normal college population.

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