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• W2135582014 abstract "Objective: The purpose of this study was to demonstrate the utility of food-reinforced operant task performance in modeling binge-eating disorder (BED). We hypothesized that food reinforcement after a caloric preload would be related to BED status, but not hunger. Methods and Procedures: We investigated the association between reports of hunger, binge tendency, and food reinforcement in a sample of 18 women (12 non-BED, 7 lean, 5 obese, and 6 obese BED). Participants completed two sessions of operant task performance after consuming 600 ml of flavored water or 600 ml of a 1 kcal/ml liquid meal. Results: Under the water condition, food reinforcement did not differ between the non-BED and BED groups, and was positively correlated with hunger ratings across all participants (r = 0.55, P = 0.023). Under the liquid meal condition, food reinforcement was significantly decreased compared with the water condition in the non-BED group (t = −2.6, P = 0.026). There was also a significant difference between the non-BED and BED groups in the fed condition (41 ± 40, 117 ± 60, F = 10.3, P = 0.005, non-BED vs. BED, respectively, mean ± s.d.). The correlation between food reinforcement and hunger remained significant only in the non-BED group (r = 0.69, P = 0.011). Discussion: Our results support the hypothesis that food reinforcement measured after a caloric preload is related to BED status but not hunger in those subjects with BED. The data also suggest that operant task performance can be useful in modeling BED criteria such as “eating when not physically hungry.”" @default.
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• W2135582014 date "2008-08-01" @default.
• W2135582014 modified "2023-10-14" @default.
• W2135582014 title "Use of an Operant Task to Estimate Food Reinforcement in Adult Humans With and Without BED" @default.
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• W2135582014 doi "https://doi.org/10.1038/oby.2008.281" @default.
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