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Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
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What explains personality change intervention effects?

Michael D Krämer1, Christopher J Hopwood1, Travis J Miller2

  • 1Department of Psychology, University of Zurich.

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Summary
This summary is machine-generated.

Personality change interventions show promise, but new research suggests control groups experienced similar changes. This indicates potential expectancy and demand effects, questioning intervention effectiveness.

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Area of Science:

  • Psychology
  • Personality Science
  • Behavioral Interventions

Background:

  • Volitional personality change interventions aim to align current traits with ideal selves.
  • Existing research often overlooks self-acceptance as a pathway and control for expectancy effects.

Purpose of the Study:

  • To contrast self-improvement and self-acceptance interventions for personality change.
  • To examine well-being changes as a byproduct of personality interventions.
  • To evaluate intervention effectiveness using a waitlist control group.

Main Methods:

  • Three randomized online studies (N=2,094) compared self-improvement and self-acceptance interventions.
  • Interventions lasted 3 months, with follow-ups.
  • A waitlist control group was included to assess expectancy and demand effects.

Main Results:

  • Both intervention groups showed reduced personality discrepancies and increased well-being.
  • Current personality traits shifted, while ideal personality remained stable.
  • Control groups exhibited similar changes, with no significant differences from intervention groups.

Conclusions:

  • Previous intervention designs have shortcomings, and theoretical frameworks need refinement.
  • Expectancy and demand effects, potentially induced by recruitment framing, significantly influenced outcomes.
  • Future research should employ multimethod studies and microrandomization.