The classic suggestion effect: Relationships with scales of hypnotizability, effortless experiencing, and imagery vividness

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Abstract
How well the Stanford Hypnotic Susceptibility Scales (Weitz-enhoffer & Hilgard, 1959, 1962) assess what Weitzenhoffer (1978) terms the “classic suggestion effect” is addressed by developing an index of nonvolitional behavior (N-VB) for a group form of the Stanford Hypnotic Susceptibility Scale, Form C (SHSS:C) of Weitzenhoffer and Hilgard (1962) given to 43 Ss. The N-VB index, reflecting the classic suggestion effect's dual criteria of both behavioral responsiveness to suggestion and nonvolition ratings, was correlated highly with the traditional scoring of the group SHSS:C and moderately with the Harvard Group Scale of Hypnotic Susceptibility, Form A (Shor & E. Orne, 1962). Effortless experiencing of imagination and imagery vividness relate similarly to traditional and N-VB scores of hypnotizability. In addition, the relationship between involuntary ratings and passing and failing an item of the group SHSS:C was examined for each of the 10 items. Thew was a significant relationship for 7 of the items.

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