Hypnotic Time Distortion and the Enhancement of Learning: New Data Pertinent to the Krauss-Katzell-Krauss Experiment

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Abstract
Krauss, Katzell, and Krauss (1974) reported that free-recall learning can be markedly enhanced by suggestions given under hypnosis that three minutes of study time is equivalent to 10 minutes of study time. The present investigation, which incorporated features similar to the Krauss et al. study, did not yield similar results. Subjects learned a comparable number of words for a comparable amount of study time, regardless of whether they were exposed to hypnotic time distortion instructions, special motivating instructions, or control instructions. The results are discussed in terms of general problems in modern research on hypnotism.