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Related Experiment Videos

Hypnotizability and posttraumatic stress disorder: a prospective study.

Richard A Bryant1, Rachel M Guthrie, Michelle L Moulds

  • 1School of Psychology, University of New South Wales, Sydney, Australia. r.bryant@unsw.edu.au

The International Journal of Clinical and Experimental Hypnosis
|November 5, 2003
PubMed
Summary

Posttraumatic stress disorder (PTSD) may be linked to stable hypnotizability, but this study found that hypnotizability levels can change after trauma and correlate with PTSD avoidance symptoms.

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Area of Science:

  • Psychology
  • Psychiatry
  • Trauma Studies

Background:

  • Converging evidence suggests a link between posttraumatic stress disorder (PTSD) and higher hypnotizability.
  • However, the stability of hypnotizability levels following trauma remains unexplored.

Purpose of the Study:

  • To investigate the stability of hypnotizability in individuals with acute stress disorder (ASD) after trauma.
  • To explore the relationship between changes in hypnotizability and PTSD symptom severity, particularly avoidance behaviors.

Main Methods:

  • Forty-five participants with ASD were assessed for hypnotizability using the Stanford Hypnotic Clinical Scale (SHCS) within four weeks of trauma.
  • Participants received a brief cognitive-behavior therapy (CBT) program.
  • Hypnotizability was reassessed using the SHCS six months post-treatment.

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Main Results:

  • While overall hypnotizability scores showed moderate stability (r = .47), two-thirds of participants exhibited different responses across the two assessments.
  • An increase in SHCS scores at the six-month follow-up was significantly correlated with elevated PTSD avoidance scores.

Conclusions:

  • Elevated hypnotizability in posttraumatic stress disorder (PTSD) populations may not be entirely stable.
  • Changes in hypnotizability following trauma may be associated with specific PTSD symptom clusters, such as avoidance.