Title

Inhibiting food reward: delay discounting, food reward sensitivity, and palatable food intake in overweight and obese women

UMMS Affiliation

Department of Medicine, Division of Preventive and Behavioral Medicine

Date

11-2011

Document Type

Article

Medical Subject Headings

Adolescent; Adult; Appetite; *Eating; Energy Intake; Female; Food Preferences; Humans; Hyperphagia; *Inhibition (Psychology); Linear Models; Middle Aged; Obesity; Overweight; Reward; Taste; Young Adult

Disciplines

Behavior and Behavior Mechanisms | Community Health | Community Health and Preventive Medicine | Public Health | Women's Health

Abstract

Overeating is believed to result when the appetitive motivation to consume palatable food exceeds an individual's capacity for inhibitory control of eating. This hypothesis was supported in recent studies involving predominantly normal weight women, but has not been tested in obese populations. The current study tested the interaction between food reward sensitivity and inhibitory control in predicting palatable food intake among energy-replete overweight and obese women (N = 62). Sensitivity to palatable food reward was measured with the Power of Food Scale. Inhibitory control was assessed with a computerized choice task that captures the tendency to discount large delayed rewards relative to smaller immediate rewards. Participants completed an eating in the absence of hunger protocol in which homeostatic energy needs were eliminated with a bland preload of plain oatmeal, followed by a bogus laboratory taste test of palatable and bland snacks. The interaction between food reward sensitivity and inhibitory control was a significant predictor of palatable food intake in regression analyses controlling for BMI and the amount of preload consumed. Probing this interaction indicated that higher food reward sensitivity predicted greater palatable food intake at low levels of inhibitory control, but was not associated with intake at high levels of inhibitory control. As expected, no associations were found in a similar regression analysis predicting intake of bland foods. Findings support a neurobehavioral model of eating behavior in which sensitivity to palatable food reward drives overeating only when accompanied by insufficient inhibitory control. Strengthening inhibitory control could enhance weight management programs.

Comments

Citation: Appelhans BM, Woolf K, Pagoto SL, Schneider KL, Whited MC, Liebman R. Inhibiting food reward: delay discounting, food reward sensitivity, and palatable food intake in overweight and obese women. Obesity (Silver Spring). 2011 Nov;19(11):2175-82. doi: 10.1038/oby.2011.57. Link to article on publisher's site

Related Resources

Link to Article in PubMed

PubMed ID

21475139