Saskia Van der Oord1,2,3, Caroline Braet4, Samuele Cortese5,6,7, Laurence Claes8,9. 1. Clinical Psychology, Faculty of Psychology and Educational Sciences, KU Leuven, Louvain, Belgium. saskia.vanderoord@kuleuven.be. 2. Developmental Psychology, University of Amsterdam, Amsterdam, The Netherlands. saskia.vanderoord@kuleuven.be. 3. Clinical Psychology, Department of Psychology and Educational Sciences, KU Leuven, Tiensestraat 102 bus 3720, room 03.78, 3000, Louvain, Belgium. saskia.vanderoord@kuleuven.be. 4. Faculty of Psychology and Educational Sciences, Ghent University, Ghent, Belgium. 5. Academic Unit of Psychology, Developmental Brain-Behavior Laboratory, University of Southampton, Southampton, UK. 6. New York University Child Study Center, New York, USA. 7. Solent NHS Trust, Southampton, UK. 8. Clinical Psychology, Faculty of Psychology and Educational Sciences, KU Leuven, Louvain, Belgium. 9. Faculty of Medical Sciences and Mental Health (CAPRI), UAntwerp, Antwerp, Belgium.
Abstract
INTRODUCTION: There may be shared neuropsychological dysfunctions in ADHD and obesity. This study tested a neuropsychological model of ADHD (reward/executive dysfunctioning) in individuals with obesity. Furthermore, the association between co-morbid binge eating and reward/executive dysfunction was explored. METHODS: Reward/executive dysfunctioning was assessed using both neuropsychological measures and questionnaires in individuals (aged 17-68) with obesity (N = 39; mean BMI = 39.70) and normal weight (N = 25; mean BMI = 22.94). RESULTS: No significant differences emerged between individuals with and without obesity on the outcome measures. However, individuals with obesity and binge eating showed significantly more self-reported delay discounting and inattention than those individuals with obesity but without binge eating. When controlling for inattention, this difference in delay discounting was no longer significant. DISCUSSION: Not obesity alone but obesity with binge eating was specifically associated with a mechanism often reported in ADHD, namely delay discounting. However, this effect may be more driven by inattention.
INTRODUCTION: There may be shared neuropsychological dysfunctions in ADHD and obesity. This study tested a neuropsychological model of ADHD (reward/executive dysfunctioning) in individuals with obesity. Furthermore, the association between co-morbid binge eating and reward/executive dysfunction was explored. METHODS: Reward/executive dysfunctioning was assessed using both neuropsychological measures and questionnaires in individuals (aged 17-68) with obesity (N = 39; mean BMI = 39.70) and normal weight (N = 25; mean BMI = 22.94). RESULTS: No significant differences emerged between individuals with and without obesity on the outcome measures. However, individuals with obesity and binge eating showed significantly more self-reported delay discounting and inattention than those individuals with obesity but without binge eating. When controlling for inattention, this difference in delay discounting was no longer significant. DISCUSSION: Not obesity alone but obesity with binge eating was specifically associated with a mechanism often reported in ADHD, namely delay discounting. However, this effect may be more driven by inattention.
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