Cited by 225Pain Management and Placebo EffectOptimism, Hope, and Well-beingPsychotherapy Techniques and Applications

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Reconsidering the role of personality in placebo effects: Dispositional optimism, situational expectations, and the placebo response

Geers, Andrew L., Helfer, Suzanne G., Kosbab, Kristin, Weiland, Paul E., Landry, Sarah J.·2005·Journal of Psychosomatic Research

DOI 10.1016/j.jpsychores.2004.08.011

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Abstract

Objective Prior investigations have failed to find reliable personality differences in placebo responding. The present study tests the hypothesis that personality and situational variables interact to determine placebo responding.Methods Optimists and pessimists were randomly assigned to one of three conditions. In the first condition, the participants were told that they were to ingest a pill that would make them feel unpleasant (deceptive-expectation group). In the second condition, the participants were told that they were to ingest a pill that would make them feel either unpleasant or was an inactive substance (conditional-expectation group). Finally, a third group was told they were to ingest a pill that was inactive (control group).Results Pessimists were more likely than optimists to follow a negative-placebo expectation when given a deceptive expectation, but not when given a conditional expectation.Conclusion The personality variable optimism-pessimism relates to placebo responding when individuals are given a deceptive but not a conditional expectation. This suggests that personality and situational variables interact to determine placebo responding.

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Authors: Geers, A. L., Helfer, S. G., Kosbab, K., Weiland, P. E., & Landry, S. J.
Affiliations: University of Toledo (US)
Adrian College (US)
Corresponding author: Geers, Andrew L.
ORCID: Geers, Andrew L.
Venue: Journal of Psychosomatic Research
Publisher: Elsevier BV
Published: 2005-02
Volume: 58
Issue: 2
Pages: 121-127
ISSN: 0022-3999 (ISSN-L)
DOI: 10.1016/j.jpsychores.2004.08.011
OpenAlex: W2076911676
Cited by: 225
References: 95
Citations by year: 2026: 3 · 2025: 7 · 2024: 16 · 2023: 5 · 2022: 12 · 2021: 9 · 2020: 13 · 2019: 10 · 2018: 13 · 2017: 14 · 2016: 14 · 2015: 12 · 2014: 20 · 2013: 12 · 2012: 9
FWCI: 3.62
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Journal of Psychosomatic Research (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
Social Sciences › Psychology › Applied Psychology › Optimism, Hope, and Well-being
Social Sciences › Psychology › Clinical Psychology › Psychotherapy Techniques and Applications
Keywords: placebo effect, personality, dispositional optimism, pessimism, conditional expectation, placebo response
MeSH terms: Adult, Affect, Attitude, Female, Humans, Male, Personality, Personality Tests, Placebos, Surveys and Questionnaires, Placebo Effect

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Reconsidering the role of personality in placebo effects: Dispositional optimism, situational expectations, and the placebo response

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