The purpose of the study is to test a newly developed individual psychotherapy treatment for binge eating disorder in adults. This treatment is a type of individual psychotherapy called Integrative Cognitive-Affective Therapy (ICAT) that focuses on helping people change their behaviors, feelings, thoughts about themselves, and relationships. This new treatment is being compared to an existing treatment called Cognitive-Behavior Therapy-Guided Self Help (CBTgsh), which focuses on changing behavior patterns through the use of reading and homework assignments along with sessions with a therapist. The primary hypothesis of this investigation is that ICAT will be associated with greater reductions in binge eating at end of treatment and follow-up compared to CBTgsh.

Inclusion Criteria:

• Binge eating disorder (DSM-5)

Exclusion Criteria:

• History of gastric bypass surgery
• Medical condition acutely affecting eating and/or weight
• Current medical and/or psychiatric instability (e.g., acute suicidality)
• Psychosis and/or bipolar disorder
• Severe cognitive impairment or developmental disability
• Inability to read English
• Current substance use disorder
• Current participation in psychotherapy and/or commercial weight loss program
• Change in dosage and/or frequency of psychotropic medication in the past 6 weeks
• Pregnant or breast feeding
• BMI < 21