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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...
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.
Spare Receptors01:30

Spare Receptors

Some receptors remain unoccupied even when an agonist produces a maximal response. Such empty ones are called spare receptors. In presence of spare receptors the maximum effect of an agonist drug is achieved with fewer than 100% of the receptors being occupied. To determine the presence of spare receptors, scientists often compare the concentration of the drug needed to produce 50% of the maximum effect (EC50) with the concentration of the drug needed to occupy 50% of the receptors (Kd). If the...
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...
Drug-Receptor Interaction: Antagonist01:28

Drug-Receptor Interaction: Antagonist

An antagonist is a drug that binds strongly to a receptor without activating it. An antagonist prevents other molecules, such as neurotransmitters or hormones, from binding to the receptor and triggering a cellular response. Such interaction effectively hinders the normal physiological processes mediated by the receptor, resulting in various pharmacological effects depending on the specific receptor targeted.
Antagonists can be classified as competitive or noncompetitive based on their...

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Related Experiment Video

Updated: May 30, 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

[Placebo, an underestimated ally].

C Cedraschi1, J Desmeules, V Piguet

  • 1Service de Médecine Interne de Réhabilitation Beau-Séjour, HUG, Genève. christine.cedraschi@hcuge.ch

Revue Medicale Suisse
|August 6, 2011
PubMed
Summary
This summary is machine-generated.

Patient expectations significantly influence treatment outcomes, impacting subjective results through placebo effects. Research highlights how beliefs about pain, illness, and surgery can modulate these effects.

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Last Updated: May 30, 2026

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Area of Science:

  • Psychosomatic Medicine
  • Clinical Psychology
  • Medical Sociology

Context:

  • Growing recognition of patient-centered outcomes.
  • Importance of patient beliefs and expectations in healthcare.
  • Understanding the placebo effect in medical treatments.

Purpose:

  • To explore the influence of patient expectations on treatment outcomes.
  • To investigate the relationship between expectations and placebo effects.
  • To examine the role of surgery in mediating placebo responses.

Summary:

  • Patient views, including beliefs about pain and illness, are crucial.
  • Patient expectations significantly impact subjective outcomes.
  • Expectations mediate and modulate placebo effects, particularly in surgical contexts.

Impact:

  • Highlights the psychological dimensions of healing.
  • Suggests potential for enhancing therapeutic interventions through expectation management.
  • Underscores the complex interplay between patient psychology and medical procedures like surgery.