Neurobiological and Psychological Maintenance Mechanisms Associated With Anticipatory Reward in Bulimia Nervosa

Inclusion Criteria: Bulimia nervosa (BN) and healthy control (HC) groups: * Right-handed * Ability to read and speak in English BN group only: * Eating Disorder Examination (EDE) diagnosis of BN (i.e., at least one objective bulimic episode and one self-induced vomiting episode per week for at three months) with binge episodes always accompanied by self-induced vomiting * Stable dose for at least 6 weeks of any recent changes in medication impacting mood, appetite, or weight HC group only: * No binge eating or purging episodes for the past three months on the EDE * No current or past history of an eating disorder as diagnosed by Structured Clinical Interview for DSM-5 Disorders Exclusion Criteria: * History of gastric bypass surgery * Medical condition acutely affecting eating behavior and/or weight (i.e., pregnancy, lactation, thyroid disease) * Current medical or psychiatric instability (i.e., hospitalization required in the past three months) * Lifetime history of psychosis or bipolar disorder * History of neurological disorder or injury (i.e., stoke, head injury with \>10 minutes loss of consciousness) * Current substance use disorder * BMI less than 19 kg/m\^2 * Acute suicidality requiring hospitalization * fMRI exclusions as specifiedd by the Center for Magnetic Resonance Research * Food allergy that cannot be accommodated through substitutions to the laboratory test snack