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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...
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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.
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.
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Cognitive therapy is a psychological approach designed to address distortions in thinking, which can lead to negative emotions and unrealistic beliefs. These cognitive distortions often influence how individuals interpret and respond to situations, exacerbating emotional distress. Below are some prevalent cognitive distortions, their characteristics, and examples of how they manifest in thought processes.
Arbitrary Inference
Arbitrary inference involves making conclusions without sufficient...

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Related Experiment Video

Updated: May 17, 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

The nocebo effect: a clinicians guide.

João Data-Franco1, Michael Berk

  • 1Psychiatric Department, Hospital Santa Maria, Lisbon, Portugal. joaodatafranco@gmail.com

The Australian and New Zealand Journal of Psychiatry
|October 25, 2012
PubMed
Summary
This summary is machine-generated.

The nocebo effect, negative responses to inactive treatments, is common and clinically significant. Understanding its drivers and management strategies is crucial for clinicians to mitigate its impact.

Keywords:
Noceboadverse effectsplacebotreatment outcomes

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Last Updated: May 17, 2026

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Area of Science:

  • Medical Psychology
  • Clinical Pharmacology
  • Patient Care

Background:

  • The nocebo effect involves adverse outcomes from inactive treatments, often driven by negative expectations and conditioning.
  • Its prevalence varies significantly, with high rates reported in conditions like multiple sclerosis.

Purpose of the Study:

  • To provide an overview of the nocebo effect, focusing on its recognition, influencing factors, and management.
  • To differentiate nocebo-induced symptoms from actual drug side effects.

Main Methods:

  • Literature search of PubMed using terms 'nocebo' and 'nocebo effect'.
  • Augmented by manual reference searching of key papers and related literature.

Main Results:

  • Nocebo effects manifest as harmful effects from inactive treatments, influenced by classical conditioning and negative expectations.
  • Prevalence ranges widely (18% in migraine to over 74% in multiple sclerosis).
  • Personality traits like neuroticism and pessimism can predispose individuals; management involves awareness, careful disclosure, expectation shaping, and strengthening the therapeutic alliance.

Conclusions:

  • The nocebo effect is a prevalent and significant factor influencing clinical outcomes.
  • Clinician awareness and knowledge of management strategies are essential for mitigating its impact in clinical practice.