The Effects of Video Tape, and of Situational and Generalized Locus of Control, upon Hypnotic Susceptibility

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Abstract
This study examined the effects of mode of induction (video tape vs. live), general locus of control, and situational locus of control upon hypnotic susceptibility. A total of 62 student volunteers was hypnotized in eight small groups using the Harvard Group Scale of Hypnotic Susceptibility. Results confirmed that video taped inductions were as effective as live inductions. None of the other variables, singly or in interaction, significantly affected susceptibility scores. An analysis of variance was also performed upon Ss' subjective ratings of having experienced hypnosis. Results revealed that Ss with an external general locus of control (Rotter's I-E scale) rated themselves as having experienced hypnosis more fully. This was interpreted as a greater response to the demand characteristics of the hypnosis situation by externally controlled subjects. Discussion explores the potential flexibility provided by video tape hypnosis.

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