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Related Experiment Videos

Dichotic listening and hypnotizability: variability in ear preference.

F Spellacy, R Wilkinson

    Perceptual and Motor Skills
    |June 1, 1987
    PubMed
    Summary

    Hypnosis affects auditory processing. High hypnotic susceptibility subjects show altered ear advantage during hypnosis, suggesting narrowed attention influences brain lateralization. Low susceptibility subjects maintain consistent ear preference.

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    Area of Science:

    • Cognitive Neuroscience
    • Psychology

    Background:

    • Dichotic listening tests reveal brain lateralization for auditory processing.
    • Hypnotic susceptibility varies among individuals and can alter cognitive states.

    Purpose of the Study:

    • To investigate the effect of hypnosis on auditory processing, specifically ear advantage in dichotic listening.
    • To explore how hypnotic susceptibility influences cognitive states and brain lateralization.

    Main Methods:

    • Administered Stanford Hypnotic Susceptibility Scale-Form C and a whole-word dichotic listening test.
    • Conducted dichotic listening tests in both waking and hypnotized states.
    • Analyzed ear advantage patterns in subjects with low and high hypnotic susceptibility.

    Main Results:

    • Low hypnotizability subjects exhibited a consistent right-ear advantage in both states.
    • High hypnotizability subjects showed a left-ear advantage while waking, but a right-ear advantage when hypnotized.
    • Hypnotic narrowed attention in high susceptibility individuals correlated with a right-ear advantage.

    Conclusions:

    • Hypnosis-induced narrowed attention influences auditory processing lateralization in highly susceptible individuals.
    • Variability in cognitive states, particularly in highly hypnotizable persons, may explain atypical ear preferences in dichotic listening studies.

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