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The Placebo Effect01:54

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The placebo effect occurs when people's expectations or beliefs influence or determine their experience in a given situation. In other words, simply expecting something to happen can actually make it happen.
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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
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Related Experiment Video

Updated: Jul 13, 2026

Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
06:33

Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation

Published on: January 5, 2014

Hypnosis, hynotizability, and placebo.

Edward J Frischholz1

  • 1Loyola University and Rush North Shore Medical Center, USA. amjch@sbcglobal.net

The American Journal of Clinical Hypnosis
|August 10, 2007
PubMed
Summary
This summary is machine-generated.

Hypnotizability and placebo responsivity are distinct concepts, with limited evidence for a strong correlation. While hypnotizability is measurable, placebo responsivity lacks a standard assessment, questioning the existence of "good placebo responders."

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Published on: June 12, 2020

Area of Science:

  • Psychology
  • Neuroscience
  • Medical Research

Background:

  • Critically examines Dr. Raz's speculations on the link between placebo responsivity and hypnotizability.
  • Highlights the consensus on reliable hypnotizability measurement versus the lack of a standard measure for placebo responsivity.
  • Defines placebo (effect, response, nocebo) while noting the absence of a widely accepted measure for individual differences.

Discussion:

  • Identifies methodological considerations for studying the relationship between placebo responsivity and hypnotizability.
  • Reviews studies showing treatments with adjunctive hypnosis outperform placebo treatments.
  • Discusses a single study suggesting only a slight correlation between placebo responsivity and hypnotizability.

Key Insights:

  • Questions the concept of a
  • good placebo responder
  • .
  • Reaffirms the clinical utility of assessing hypnotizability.
  • Suggests placebo responsivity and hypnotizability are, at best, only slightly related.

Outlook:

  • Proposes future empirical research directions to investigate the nuanced relationship between placebo responsivity and hypnotizability.
  • Emphasizes the need for developing reliable measures of placebo responsivity.
  • Calls for further investigation into the distinct mechanisms underlying hypnotic and placebo responses.