title: Delay discounting predicts binge-eating in Wistar rats.
abstract: Multiple measures of impulsivity predict both obesity and binge-eating disorder; however, those who binge-eat represent a behaviorally distinct subset of all overweight individuals. In the current experiment, 10 male Wistar rats completed three conditions in counterbalanced order: (a) impulsivity assessed with a delay discounting task; (b) binge-eating measured by consumption of intermittently available Oreo cookies; and (c) diet-induced obesity proneness measured by weight gain when provided with a sweet high-fat diet ad libitum for 2 consecutive weeks. Impulsivity predicted binge-eating but not diet-induced obesity, and binge-eating and proneness to diet-induced obesity were unrelated to each other. The current data represent the first time binge-eating behavior has been associated with impulsivity in rats and suggest that recent interventions which increase subjects' tendencies to choose larger-later rewards in discounting tasks should be tested for their effects on binge-eating behavior.
authors: Department of Psychology, University of Alaska Anchorage, 3211 Providence Drive, Anchorage, AK, 99508, USA.
authors: Amanda M
authors: AM
authors: Cano
authors: Department of Psychology, University of Alaska Anchorage, 3211 Providence Drive, Anchorage, AK, 99508, USA.
authors: Eric S
authors: ES
authors: Murphy
authors: Department of Psychology, University of Alaska Anchorage, 3211 Providence Drive, Anchorage, AK, 99508, USA. Electronic address: gjlupfer@uaa.alaska.edu.
authors: Gwen
authors: G
authors: Lupfer
mesh_terms: D000818:Animals; D002032:Bulimia; D065786:Delay Discounting; D059305:Diet, High-Fat / Q000009:adverse effects; D007175:Impulsive Behavior; D008297:Male; D009765:Obesity; D051381:Rats; D017208:Rats, Wistar; D015430:Weight Gain
keywords: Binge-eating; Delay discounting; Impulsivity; Obesity