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The effect of rating scale descriptors on hypnotic depth reports
The Journal of Psychology
|July 1, 1982
Summary
The number of descriptors used to rate hypnotic depth significantly impacts results. Using scales with separate absorption and hypnosis descriptors reduced self-reported hypnosis, questioning current measurement validity.
Area of Science:
- Psychology
- Neuroscience
Background:
- Hypnotic depth is commonly measured using subjective rating scales.
- The wording and structure of these scales may influence participant responses.
Purpose of the Study:
- To investigate how the number and type of response descriptors affect hypnotic depth ratings.
- To assess the validity of different scales used in hypnosis research.
Main Methods:
- Three groups of participants (n=111 each) underwent hypnotic susceptibility testing.
- Each group rated their hypnotic depth using a different four-point scale: unidimensional, confounded descriptors, or separate descriptors for hypnosis and absorption.
Main Results:
- Fewer participants rated themselves as "hypnotized" when using scales with separate descriptors for hypnosis and absorption compared to scales without this choice.
- This effect was observed across all hypnotic susceptibility levels.
Conclusions:
- The validity of current hypnotic depth measures may be compromised by scale design.
- Researchers should exercise caution when interpreting subjective hypnotic depth ratings based on different scale formats.