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Gepubliceerd in: Journal of Behavioral Medicine 3/2011

01-06-2011

Placebo expectations and the detection of somatic information

Auteurs: Andrew L. Geers, Justin A. Wellman, Stephanie L. Fowler, Heather M. Rasinski, Suzanne G. Helfer

Gepubliceerd in: Journal of Behavioral Medicine | Uitgave 3/2011

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Abstract

In a laboratory study we examined the hypothesis that placebo expectations enhance the initial identification of placebo-relevant sensations over placebo-irrelevant sensations. Participants (N = 102) were randomly assigned to one of three expectation groups. In the first group, participants ingested a placebo capsule and were told it was caffeine (deceptive expectation). In a second group, participants ingested a placebo capsule and were told it may be caffeine or it may be a placebo (double-blind expectation). Participants in the third group were given no expectation. All participants then tallied the placebo-relevant and placebo-irrelevant sensations they experienced during a 7-min period. Participants in the deceptive expectation group identified more placebo-relevant sensations than placebo-irrelevant sensations. No-expectation participants identified more placebo-irrelevant sensations than placebo-relevant sensations. Participants given the double-blind expectation identified an equal amount of placebo-relevant and irrelevant sensations. The amount of both placebo-relevant and placebo-irrelevant sensations detected mediated the relationship between the expectation manipulation and subsequent symptom reports. These data support the position that expectations cause placebo responding, in part, by altering how one identifies bodily sensations.
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Metagegevens
Titel
Placebo expectations and the detection of somatic information
Auteurs
Andrew L. Geers
Justin A. Wellman
Stephanie L. Fowler
Heather M. Rasinski
Suzanne G. Helfer
Publicatiedatum
01-06-2011
Uitgeverij
Springer US
Gepubliceerd in
Journal of Behavioral Medicine / Uitgave 3/2011
Print ISSN: 0160-7715
Elektronisch ISSN: 1573-3521
DOI
https://doi.org/10.1007/s10865-010-9301-9

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