A COMPARISON OF SUGGESTED DREAMS OCCURRING IN HYPNOSIS AND SLEEP1
https://doi.org/10.1080/00207146408409114Abstract
A number of investigators have concluded that dreams occurring in the hypnotic state and dreams occurring in natural sleep are essentially the same phenomenon. The purpose of the present study was to carry out an objective comparison of the extent to which dreams in the 2 states were affected by (post) hypnotic suggestions to dream about a speciiied topic, in order to partially test the validity of the above conclusion. 10 Ss were trained to reach a deep hypnotic state, and then each S participated in 2 individual experimental sessions. In the Hypnotic Dream Session the S, while deeply hypnotized, was instructed to dream immediately about a tape-recorded narrative. He was then dehypno-tized and asked to describe his dream. I n the Sleep Dream Session the deeply hypnotized S was instructed to dream about a similar narrative played on the tape recorder, but the dream was to occur during his natural sleep that night. The E awakened the S for a dream report during each stage 1 dream period of the night, on the basis of EEG and eye movement recordings. All the hypnotic "dreams" were found to have been accompanied by a waking EEG pattern, a lower basal skin resistance than the stage 1 dreams of each S, and the presence of nonspecific galvanic skin responses , which were absent during stage 1 dreaming. It was thus established that the 2 types of dreams occurred in distinct neurophysiologi-cal states. The reported dream were rated on how well they conformed to the suggested narratives by a technique which was quite objective, in the sense of being highly communicable. For the group of 10 Ss, the suggestions had a significantly greater effect on dreams occurring in the hypnotic state than on dreams occurring in stage 1 sleep. Further considerations in evaluating the data are discussed, and some tentative conclusions are: (a) posthypnotic suggestion shows great promise as a technique for manipulating the content of stage 1 sleep dreams; and (b) the equating of dreams in hypnosis and sleep, both
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