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Is differential item difficulty specific to hypnosis?

R A Page1

  • 1Ohio State University, Lima 45804.

The American Journal of Clinical Hypnosis
|April 1, 1994
PubMed
Summary
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Hypnosis studies show a "parallel nonoverlapping" pattern in depth and realness reports. This pattern, along with item difficulty, is not unique to hypnosis but broadly relates to imagination abilities.

Area of Science:

  • Psychology
  • Cognitive Science

Background:

  • Previous hypnosis research identified a "parallel nonoverlapping" pattern in retrospective depth and realness reports.
  • This pattern was observed across varying levels of hypnotic susceptibility.

Purpose of the Study:

  • To investigate if the observed "parallel nonoverlapping" pattern and differential item difficulty are specific to hypnosis.
  • To explore the relationship between hypnotic susceptibility and broader imagination abilities.

Main Methods:

  • Administered the Harvard Group Scale of Hypnotic Susceptibility, Form A (HGSHS:A) to 98 undergraduates.
  • Used the scale as a "test of visual and motor imagination," excluding the eye-closure induction item.
  • Analyzed retrospective depth and realness reports in relation to susceptibility.

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Main Results:

  • A pattern similar to previous hypnosis studies was observed.
  • Results support attribution theory.
  • Differential item difficulty was found to be related to imagination, not exclusively hypnosis.

Conclusions:

  • The "parallel nonoverlapping" pattern and item difficulty in susceptibility scales are not specific to hypnosis.
  • These phenomena are more broadly associated with general imagination capabilities.
  • Findings contribute to understanding the cognitive underpinnings of hypnotic responding.