Document Detail


Can the reinforcing value of food be measured in bulimia nervosa?
MedLine Citation:
PMID:  23178173     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Binge eating is a core clinical feature of bulimia nervosa (BN). Enhanced reinforcing value of food may play a role in this behavioral disturbance, but a systematic behavioral assessment of objective measures of the rewarding value of binge eating is lacking. The purpose of this study was to quantify the reinforcing value of food in BN patients as compared with normal controls. A progressive ratio (PR) computerized work task was completed under binge and non-binge instruction. The task consisted of 12 trials. The first trial required 50 keyboard taps to earn one portion of yogurt shake, and subsequent trials required progressive work increments of 200 taps for each additional portion. Completion of all 12 trials required 13,800 taps to earn 2100ml of shake. The breakpoint, defined as the largest ratio completed before a participant stopped working, was the measure of reinforcing efficacy. Ten patients and 10 controls completed the experiment. Under binge instruction, patients completed more trials and taps, and had a higher breakpoint than controls. The non-binge instruction yielded opposite findings; compared to controls, patients completed fewer trials and taps, and had a lower breakpoint. These results support the feasibility and potential utility of a PR task to quantify the reinforcing value of food in patients with BN.
Authors:
Janet Schebendach; Allegra Broft; Richard W Foltin; B Timothy Walsh
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article; Research Support, N.I.H., Extramural     Date:  2012-11-23
Journal Detail:
Title:  Appetite     Volume:  62     ISSN:  1095-8304     ISO Abbreviation:  Appetite     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-01-22     Completed Date:  2013-06-27     Revised Date:  2014-03-07    
Medline Journal Info:
Nlm Unique ID:  8006808     Medline TA:  Appetite     Country:  England    
Other Details:
Languages:  eng     Pagination:  70-5     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Adult
Binge-Eating Disorder / psychology*
Bulimia / psychology*
Bulimia Nervosa / psychology*
Diet*
Evaluation Studies as Topic
Female
Humans
Reward*
Work*
Yogurt
Young Adult
Grant Support
ID/Acronym/Agency:
K05 DA031749/DA/NIDA NIH HHS; R21 MH065024/MH/NIMH NIH HHS; R21MH065024/MH/NIMH NIH HHS
Chemical
Reg. No./Substance:
E78ZFF4KQ0/Reward
Comments/Corrections

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