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Inhibitory control and decision making under risk in bulimia nervosa and binge‐eating disorder
Author(s) -
Wu Mudan,
Giel Katrin Elisabeth,
Skunde Mandy,
Schag Kathrin,
Rudofsky Gottfried,
Zwaan Martina,
Zipfel Stephan,
Herzog Wolfgang,
Friederich HansChristoph
Publication year - 2013
Publication title -
international journal of eating disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.785
H-Index - 138
eISSN - 1098-108X
pISSN - 0276-3478
DOI - 10.1002/eat.22143
Subject(s) - binge eating disorder , impulsivity , bulimia nervosa , psychology , binge eating , stop signal , overweight , neuropsychology , iowa gambling task , inhibitory control , body mass index , eating disorders , psychiatry , developmental psychology , cognition , medicine , electrical engineering , engineering , latency (audio)
Objective To investigate neuropsychological mechanisms of impulsivity in patients with bulimia nervosa (BN) and binge‐eating disorder (BED). Method Nineteen BN patients and 31 age‐ and body‐mass‐index (BMI)‐matched healthy controls (c‐BN) as well as 54 overweight and obese BED patients and 43 age‐ and BMI‐matched healthy controls (c‐BED) were investigated using an inhibitory control task (stop signal task, SST) and a decision‐making under risk task (game of dice task, GDT). Results Compared to c‐BN, BN patients demonstrated significant greater stop signal reaction times in the SST, but no differences for the frequency of risky decisions in the GDT. BED patients did not differ from c‐BED in the SST or the GDT. Discussion BN but not BED patients differed from their respective control groups concerning the “stopping” component of impulsivity. These differences in motor inhibition may contribute to the behavioral distinctions in binge‐eating behavior between BN and BED. © 2013 Wiley Periodicals, Inc. (Int J Eat Disord 2013; 46:721–728)