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Related Concept Videos

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Stress Prevention and Stress Management Techniques VI

Adopting a healthier lifestyle often requires overcoming significant challenges, but leveraging psychological, social, and cultural resources can facilitate meaningful change. Effective self-change hinges on understanding and applying key tools such as motivation and goal setting, which help sustain efforts toward long-term health benefits.
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Related Experiment Video

Updated: Jun 27, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
07:40

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design

Published on: May 31, 2021

Self-affirmation promotes health behavior change.

Tracy Epton1, Peter R Harris

  • 1Department of Psychology, University of Sheffield, Western Bank, Sheffield S10 2TP, England. t.epton@sheffield.ac.uk

Health Psychology : Official Journal of the Division of Health Psychology, American Psychological Association
|November 26, 2008
PubMed
Summary
This summary is machine-generated.

Self-affirmation interventions significantly increased fruit and vegetable consumption by approximately 5.5 portions weekly. This health behavior change was mediated by enhanced response efficacy.

Related Experiment Videos

Last Updated: Jun 27, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
07:40

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design

Published on: May 31, 2021

Area of Science:

  • Behavioral Science
  • Health Psychology
  • Nutrition Science

Background:

  • Self-affirmation positively influences health behavior change motivation but often fails to translate into actual behavioral shifts.
  • Previous studies may have overlooked critical factors contributing to the limited impact of self-affirmation on behavior.
  • This research addresses the gap by investigating self-affirmation's direct effect on a specific health behavior.

Purpose of the Study:

  • To determine if a self-affirmation manipulation can increase fruit and vegetable consumption.
  • To explore the mediating role of efficacy variables (response-efficacy and self-efficacy) in the self-affirmation-behavior relationship.
  • To provide evidence for the effectiveness of self-affirmation interventions in promoting health-promoting behaviors.

Main Methods:

  • A randomized controlled trial involving 93 women.
  • Participants were assigned to either a self-affirmation or a control task before reading a health message.
  • Fruit and vegetable intake was measured via a 7-day diary, with efficacy and intention measures collected immediately post-message.

Main Results:

  • Self-affirmed participants consumed significantly more fruit and vegetables (approx. 5.5 extra portions/week) compared to the control group.
  • The observed increase in consumption was significantly mediated by response-efficacy.
  • Self-efficacy and intention did not mediate the relationship.

Conclusions:

  • Self-affirmation interventions can effectively promote health-promoting behaviors, specifically increasing fruit and vegetable intake.
  • Response-efficacy is a key mechanism through which self-affirmation influences health behaviors.
  • These findings support the application of self-affirmation techniques in public health strategies.