Delay Discounting of Reward and Impulsivity in Eating Disorders : From Anorexia Nervosa to Binge Eating Disorder
Steward, Trevor (Instituto de Salud Carlos III)
Mestre-Bach, Gemma (Hospital Universitari de Bellvitge)
Vintró Alcaraz, Cristina (Hospital Universitari de Bellvitge)
Agüera, Zaida (Hospital Universitari de Bellvitge)
Jiménez Murcia, Susana (Hospital Universitari de Bellvitge)
Granero, Roser (Instituto de Salud Carlos III)
Fernández Aranda, Fernando (Hospital Universitari de Bellvitge)
Universitat Autònoma de Barcelona. Departament de Psicobiologia i de Metodologia de les Ciències de la Salut

Date:	2017
Abstract:	Evidence points to eating disorder patients displaying altered rates of delay discounting (one's degree of preference for immediate rewards over larger delayed rewards). Anorexia nervosa (AN) patients are believed to have an increased capacity to delay reward, which reflects their ability to override the drive to eat. Contrarily, binge eating disorder (BED) patients are associated with a reduced predisposition to delay gratification. Here, we investigated monetary delay discounting and impulsivity in 80 adult women with EDs (56 AN and 24 BED), diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria, and 80 healthy controls. AN-restrictive (AN-R) subtype patients showed less steep discounting rates than BED and AN-bingeing/purging subtype patients. Compared with healthy controls and AN-R patients, BED and AN-bingeing/purging patients presented higher delay discounting and positive and negative urgency levels. Our findings suggest that restriction in AN-R patients is associated with disproportionate self-control, whereas bingeing behaviours could be more driven by emotional states and impulsivity traits.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Anorexia nervosa ; Binge eating disorder ; Delay discounting ; Eating disorders ; Impulsivity
Published in:	European eating disorders review, Vol. 25 Núm. 6 (2017) , p. 601-606, ISSN 1099-0968

DOI: 10.1002/erv.2543

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