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Physiological responsiveness during hypnosis.

L M Sturgis1, W C Coe

  • 1Department of Psychology, California State University, Fresno 93740-0011.

The International Journal of Clinical and Experimental Hypnosis
|July 1, 1990
PubMed
Summary
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Hypnosis responsiveness varies with task instructions for all measured physiological responses. High hypnotizability individuals only showed greater heart rate changes compared to low hypnotizability subjects.

Area of Science:

  • Psychophysiology
  • Hypnotherapy Research
  • Cognitive Neuroscience

Background:

  • Understanding the physiological underpinnings of hypnosis is crucial for its therapeutic applications.
  • Individual differences in hypnotizability suggest varying physiological responses to hypnotic suggestion.
  • Previous research has explored physiological correlates of hypnosis with mixed results.

Purpose of the Study:

  • To investigate whether physiological responsiveness during hypnosis differs based on task instructions.
  • To determine if highly hypnotizable individuals exhibit greater physiological responsiveness than less hypnotizable individuals.
  • To examine electromyogram, respiration rate, heart rate, and skin conductance during hypnosis.

Main Methods:

  • Recorded four physiological measures: electromyogram (EMG), respiration rate, heart rate, and skin conductance.

Related Experiment Videos

  • Utilized 11 high and 11 low hypnotizable participants (Ss).
  • Administered varied task instructions during hypnotic states.

    • Main Results:

    • Physiological responsiveness significantly varied across all four measures according to task instructions, supporting the first hypothesis.
    • Highly hypnotizable individuals did not consistently show greater overall physiological responsiveness than low hypnotizable individuals.
    • Only heart rate levels were significantly higher in highly hypnotizable individuals, partially supporting the second hypothesis.

    Conclusions:

    • Hypnotic responsiveness is modulated by the specific nature of task instructions across multiple physiological systems.
    • While high hypnotizability is linked to increased heart rate responsiveness, overall physiological reactivity differences between high and low hypnotizable individuals are not consistently pronounced.
    • Future research should further explore the nuanced relationship between hypnotizability, task demands, and specific physiological responses.