Self-fulfilling prophecy and hypnotic response are not the same thing

Area of Science:

• Psychology
• Cognitive Science
• Hypnosis Research

Background:

• Previous research suggested that manipulating response expectancies, using the "bogus-item" method, could increase hypnotic responsiveness.
• The "bogus-item" methodology involves surreptitious confirmation of suggested items to influence participant expectations.

Purpose of the Study:

• To examine the effects of response expectancy manipulations on hypnotizability scores.
• To replicate or refute previous findings on the efficacy of the "bogus-item" manipulation.
• To re-evaluate the impact of expectancy on both behavioral and subjective hypnotic responsiveness.

Main Methods:

• The study employed the "bogus-item" methodology, originally developed by Wickless and Kirsch (1989).
• Two experiments were conducted: the first aimed to replicate previous findings, and the second specifically tested for enhanced response expectancies.
• Hypnotizability scores were measured after the expectancy manipulation in both experiments.

Main Results:

• The first experiment failed to replicate Wickless and Kirsch's (1989) findings regarding increased hypnotic responsiveness.
• The second experiment confirmed that the bogus-item manipulation significantly increased participants' response expectancies.
• Despite increased expectancies, no evidence was found that the manipulation led to increased hypnotic responsiveness.

Conclusions:

• Hypnotic responsiveness may be less reactive to expectancy manipulations than previously suggested.
• The findings question the extent to which expectancy influences hypnotic performance.
• The study supports the viability of considering hypnotic responsiveness as a trait-like ability rather than solely a state influenced by external manipulation.