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Related Concept Videos

The Placebo Effect01:54

The Placebo Effect

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.
Blind Procedures02:07

Blind Procedures

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...
Cognitive Theories: Schachter-Singer Theory of Emotion01:20

Cognitive Theories: Schachter-Singer Theory of Emotion

Stanley Schachter and Jerome Singer proposed the two-factor theory of emotion, which emphasizes the interplay between physiological arousal and cognitive labeling in forming emotional experiences. This theory suggests that emotions are not simply a result of physiological responses but rather a combination of these responses and the individual's cognitive interpretation of them.
Physiological Arousal and Cognitive Labeling
According to this theory, when an individual experiences physiological...
Classical Conditioning in Daily Life01:17

Classical Conditioning in Daily Life

Classical conditioning, a fundamental principle of associative learning, explains various phenomena observed in daily life, such as fear development, the placebo effect, taste aversion, and drug habituation. These applications demonstrate the profound impact of associative learning on human behavior and physiological responses.
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
Social Proof00:52

Social Proof

Social proof is a form of persuasion based on comparison and conformity. People compare their behavior and actions to what others are doing and will change to conform to do what their peers do.
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

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Related Experiment Video

Updated: Jun 7, 2026

How to Study Placebo Responses in Motion Sickness with a Rotation Chair Paradigm in Healthy Participants
08:50

How to Study Placebo Responses in Motion Sickness with a Rotation Chair Paradigm in Healthy Participants

Published on: December 14, 2014

Semiotics and the placebo effect.

Franklin G Miller1, Luana Colloca

  • 1Department of Bioethics, Clinical Center, National Institutes of Health, Bethesda, MD 20892-1156, USA. fmiller@nih.gov

Perspectives in Biology and Medicine
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

The placebo effect

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Area of Science:

  • Neuroscience
  • Philosophy of Mind
  • Psychology

Background:

  • Neurobiological mechanisms of the placebo effect are well-studied.
  • Theoretical understanding of the placebo effect remains underdeveloped.

Purpose of the Study:

  • To propose a theoretical framework for understanding placebo effects.
  • To apply Charles Peirce's semiotic theory to explain placebo phenomena.

Main Methods:

  • Utilized Charles Peirce's semiotic theory.
  • Integrated psychological mechanisms (conditioning, expectation) with biological and cultural dimensions.

Main Results:

  • Semiotic theory provides a robust account of placebo effects.
  • Placebo effects involve the apprehension and response to signs.

Conclusions:

  • Semiotic approach offers a comprehensive theoretical model for placebo effects.
  • This framework bridges psychological, biological, and cultural aspects of placebo phenomena.