Consciousness and Cognition 12 (2):219-230 (2003)

Two experiments investigated the reality attributed to hypnotic suggestion through subtle projection of a visual image during simultaneous suggestion for a visual hallucination that resembled the projected image. In Experiment 1, high and low hypnotizable participants were administered either a hypnotic induction or wake instructions, given a suggestion to hallucinate a shape, and then the projected image was subsequently introduced. Although highs in both conditions rated the projected image more vividly than lows, highs in the hypnosis condition made comparable reality ratings when the projected image was absent and present. In Experiment 2, high hypnotizable participants were administered a suggestion to see a shape on a wall. For half the participants the suggested image was projected on the wall and then removed, and for half the projection was initially absent and then introduced. Participants who had the projection absent and then present reported comparable reality and vividness ratings when the projection was absent and present. These findings indicate that elevated hypnotizability and hypnosis are associated with attributions of external reality to suggested experiences
Keywords *Hypnosis  *Hypnotic Susceptibility  *Imagery  *Suggestibility  *Visual Hallucinations  Form and Shape Perception  Reality  Self Monitoring
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DOI 10.1016/s1053-8100(03)00003-5
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An Experimental Study of Imagination.Charles West Perky - 1911 - Philosophical Review 20:108.

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