Reward retraining: A pilot randomized controlled trial of a novel treatment approach for transdiagnostic binge eating.

ABSTRACT

OBJECTIVE: Low reward response to conventionally rewarding stimuli and high reward response to food (i.e., reward imbalance), has been supported as a maintenance factor for eating disorders characterized by binge eating. The current study was a pilot randomized controlled trial testing a novel treatment approach for binge eating targeting reward imbalance, called Reward Re-Training (RRT), in comparison to a therapeutic attention control condition (supportive psychotherapy; ST). METHOD: Fifty-nine participants were randomly assigned to receive either 10 group sessions of RRT or ST via videoconferencing software. Assessments of eating pathology and hypothesized treatment targets were completed at pretreatment, mid-treatment, and posttreatment, and 3-month following the end of treatment. RESULTS: Feasibility and acceptability success benchmarks were achieved. Results found a significant indirect effect of RRT on lower posttreatment global eating pathology through decreases in reward to food from pretreatment to mid-treatment. No significant differences were observed between groups in terms of change in hypothesized treatment mechanisms or outcomes at posttreatment or 3-month follow-up. DISCUSSION: The current study supports the feasibility and acceptability of RRT, and the preliminary efficacy of both RRT and ST. Further research comparing these approaches to CBT would help to inform who might benefit from non-CBT based treatment approaches. PUBLIC SIGNIFICANCE: The current pilot study supports the feasibility and acceptability of Reward Re-Training (RRT) as a treatment for binge eating (BE). RRT produced large, but similar, reductions in overall eating pathology and BE frequency compared to supportive psychotherapy (ST) by 3-month follow-up. This study supports further testing of indirect treatments such as RRT for binge eating.