Jake Linardon

Objective Theoretical models highlight body image disturbances as central to the maintenance of eating disorders, with empirical evidence finding negative body image to be a robust predictor of treatment nonresponse, relapse and symptom persistence. Accessible, scalable, and inexpensive interventions that can effectively target negative body image across the eating disorders are needed. We developed an online single session intervention (SSI) for negative body image and evaluated its acceptability and efficacy in a randomized controlled trial in individuals with recurrent binge eating. Method Participants with recurrent binge eating were randomly assigned to the SSI ( n = 99) or a waitlist ( n = 101). Assessments were conducted at baseline, 4 week follow‐up, and 8 week follow‐up. Results 81% of participants accessed the SSI, demonstrating reasonable uptake. However, issues with attrition were apparent; a 32% study dropout rate was observed at posttest, while a 58% dropout rate was observed at follow‐up. 87% of participants who completed satisfaction measures would recommend the SSI. SSI participants experienced greater improvements in negative body image at both 4 ( d = −0.65) and 8 week ( d = −0.74) follow‐up. Significant between‐group effects were also observed on most other secondary symptom measures, though no differences were found for motivations and help‐seeking beliefs and intentions. Conclusion Body image‐focused self‐guided SSIs for recurrent binge are largely accepted by those who are retained in the trial, but are associated with significant attrition. Although SSIs are not intended to replace standard treatment, they may help with short‐term symptom management and could play an important role in eating disorder care. Public Significance Single session interventions (SSI) are a potentially accessible, scalable, and cost‐effective way to deliver evidence‐based treatment content to people with eating disorders. This study shows that an online (SSI) designed to target body image among people with recurrent binge eating is accepted and produced short‐term symptom relief.