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Placebo prevents rumination: An experimental study.

Lea Rebstock1, Leonora N Schäfer1, Tobias Kube2

  • 1Department for Clinical Psychology and Psychotherapy, Philipps-University of Marburg, Gutenbergstraße 18, 35032 Marburg, Germany.

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|July 16, 2020
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Summary

Believing they received medication to prevent rumination significantly reduced rumination and sadness in healthy adults. This suggests placebo effects can positively influence depressive symptoms and warrant further clinical investigation.

Keywords:
DepressionExpectationsMood inductionPlaceboRumination

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Area of Science:

  • Psychology
  • Neuroscience
  • Clinical Psychiatry

Background:

  • Rumination is a significant risk factor for depression.
  • Targeting rumination is crucial for effective depression treatment.

Purpose of the Study:

  • To investigate if the belief in receiving anti-rumination medication can reduce rumination.
  • To examine the impact of placebo expectancy on rumination and sadness.

Main Methods:

  • Healthy participants (N=91) underwent induced dysphoria.
  • Random assignment to a deceptive placebo group with expectancy instructions or a control group.
  • Rumination was induced, and changes in rumination and sadness were measured.

Main Results:

  • The placebo group showed a significantly lower increase in rumination (d=0.57).
  • The placebo group reported a significantly greater decrease in sadness (d=0.69).

Conclusions:

  • Placebo treatment positively influenced rumination and sadness in healthy individuals.
  • Further research with clinically depressed patients is needed to evaluate clinical potential.
  • Clinicians should consider patient expectations regarding rumination and treatment outcomes.