Dissonance and healthy weight eating disorder prevention programs: long-term effects from a randomized efficacy trial

Area of Science:

• Psychology
• Public Health
• Behavioral Science

Background:

• Body dissatisfaction is a significant concern among adolescent girls.
• Internalization of the thin ideal contributes to negative body image and disordered eating.
• Effective interventions are needed to address these issues in vulnerable populations.

Purpose of the Study:

• To evaluate the efficacy of a dissonance-based thin-ideal internalization reduction program compared to a healthy weight control, expressive writing, and assessment-only control.
• To assess long-term effects on body dissatisfaction, thin-ideal internalization, and eating disorder pathology.
• To determine the impact on psychosocial impairment and risk for eating pathology and obesity onset.

Main Methods:

• Randomized controlled trial with 481 adolescent girls.
• Intervention groups included dissonance-based, healthy weight control, and expressive writing.
• Assessment-only group served as a control; follow-up through 2-3 years.

Main Results:

• Dissonance and healthy weight programs significantly reduced thin-ideal internalization, body dissatisfaction, and psychosocial impairment compared to controls.
• Both programs led to significant reductions in eating disorder symptoms and risk for eating pathology onset.
• Healthy weight program also reduced obesity onset risk; effects were clinically significant and enduring.

Conclusions:

• Dissonance-based and healthy weight interventions are effective in reducing body dissatisfaction and eating disorder risks in adolescent girls.
• These programs demonstrate clinically important and enduring effects on mental health and weight-related outcomes.
• Interventions targeting thin-ideal internalization and promoting healthy weight are crucial for adolescent well-being.