The goal of this controlled trial is to learn whether a brief single-session intervention (SSI) can reduce binge eating symptoms by targeting overvaluation of weight/shape in women with recurrent binge eating.
The main questions it aims to answer are:
* Does assessment alone reduce binge eating severity and overvaluation of weight/shape compared to a control group undergoing minimal assessment? * Does adding a values-based reflection and goal-setting component (the full SHAPE intervention) add benefits beyond the assessment alone?
Researchers will compare three groups:
1. assessment-only, 2. full SHAPE intervention, and 3. minimal assessment control to see if both active conditions outperform the control, and whether the full intervention adds any benefits beyond the assessment itself
Participants will:
* Complete a semi-structured eating disorder assessment (Eating Disorder Examination) * Depending on assignment, also complete a values-based reflection and goal-setting exercise with psychoeducation * Complete follow-up assessments evaluating binge eating severity, overvaluation of weight/shape, clinical impairment, binge frequency, and related outcomes.
≥ 18 years old
Identify as cisgender female
self-reported BMI ≥ 18.5 kg/m²
Rate the extent to which their weight or shape influences how they feel about themselves as a "4" or higher on a 7-point Likert scale on screening measures
< 18 years old
Assigned male at birth
Gender identity different from biological sex indicated on birth certificate
Purging behaviors (i.e., self-induced vomiting, laxative misuse, or diuretic misuse) ≥ 1x/week in the last 3 months at the time of screening.