Imagery interventions in health behavior: A meta-analysis.

Area of Science:

• Behavioral Science
• Health Psychology
• Intervention Science

Background:

• Imagery-based interventions offer a cost-effective approach to modify health behaviors and improve health outcomes.
• Existing research on mental imagery in health behavior interventions demonstrates significant variability in effectiveness.

Purpose of the Study:

• To quantitatively synthesize the effectiveness of mental imagery interventions on health behavior.
• To examine key moderators influencing the efficacy of these interventions.

Main Methods:

• A systematic literature search was conducted across databases, supplemented by manual searches and author contact.
• Data extraction focused on imagery intervention effects on behavioral, psychological, and physiological outcomes, alongside potential moderators.
• Twenty-six studies (33 data sets) met eligibility criteria for meta-analytic review.

Main Results:

• Mental imagery interventions yielded small averaged effect sizes for postintervention behavior, intention, perceived control, and attitude.
• A small-to-medium effect size was observed for postintervention physiological measures.
• Moderator analyses revealed larger effects in older, non-student samples, with detailed instructions, higher study quality, and longer intervention duration.
• Behavioral and physiological outcomes showed larger effect sizes than psychological outcomes.

Conclusions:

• Evidence supports the effectiveness of mental imagery interventions for influencing health behaviors.
• Specific conditions, such as target population and intervention design, can optimize imagery intervention efficacy.
• Future research should leverage these findings to refine and enhance mental imagery-based health behavior change strategies.