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Ernest R. Hilgard, PhD

Arch Gen Psychiatry. 1982;39(8):963-966.

Abstract
• In Spiegel’s Hypnotic Induction Profile (HIP), a scale for measuring hypnotic responsiveness, the claim has been made that the eye-roll sign (ER) can predict hypnotizability usable in clinical practice with a success rate of 75%. Using data from thousands of clinical cases, the ER correlated.22 with other items within the HIP—not high enough for predictive purposes. The present analysis shows how clinical observations uncorrected by statistical analysis can lead to illusory interpretations.

Author Affiliations
From the Department of Psychiatry, Stanford University, Stanford, Calif.

Footnotes
Accepted for publication April 13, 1981.

Reprint requests to Department of Psychiatry, Building 420, Stanford University, Stanford, CA 94305 (Dr Hilgard).

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