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Factors affecting placebo acceptability: deception, outcome, and disease severity
Nkaku R Kisaalita1, Daniela Roditi, Michael E Robinson
1Center for Pain Research and Behavioral Health, Department of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610, USA.
The Journal of Pain
|August 6, 2011
Summary
This study found that people find analgesic placebos acceptable if they are moderately effective, even with some deception. Patient mood and physician relationship depend on treatment instructions and outcomes.
Area of Science:
- Medical Ethics
- Psychology
- Pain Management
Background:
- Evidence supports placebo analgesia efficacy and mechanisms.
- Ethical use of placebos remains debated, often based on philosophical arguments.
Purpose of the Study:
- To empirically investigate the acceptability of analgesic placebo treatments among lay individuals.
- To examine how deception, treatment outcome, and pain severity influence placebo acceptability.
Main Methods:
- A web-based study with 103 participants responding to vignettes depicting placebo analgesic use.
- Experimental manipulation of placebo instructions (deception level), treatment outcome, and patient pain severity.
- Measurement of perceived deception, physician-patient relationship, patient mood, and overall placebo acceptability.
Main Results:
- Placebos described with varying levels of deception were rated similarly in deceptiveness.
- Patient mood and physician approval were influenced by both treatment instructions and outcomes.
- Analgesic response mitigated negative consequences of deceptive placebo administration.
- Participants tolerated moderate effectiveness and negative consequences in acceptable placebos.
Conclusions:
- This study provides an empirical examination of analgesic placebo acceptability in lay individuals.
- Findings systematically manipulate deception, outcome, and severity, revealing their interaction in determining placebo acceptability.
- Results inform the clinical use of placebos and highlight the need for studies on public understanding of placebo effectiveness.
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