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Linking Grazing to Inhibition and Goal-Directed Behaviour in Obesity With and Without Eating Disorder Features

Published online by Cambridge University Press:  28 September 2020

Andreea I. Heriseanu Open the ORCID record for Andreea I. Heriseanu [Opens in a new window] ,
Phillipa Hay  and
Stephen Touyz
Andreea I. Heriseanu*
Affiliation:
Clinical Psychology Unit, School of Psychology, University of Sydney, Camperdown, New South Wales2050, Australia eCentreClinic, Department of Psychology, Macquarie University, Macquarie Park, NSW 2109, Australia
Phillipa Hay
Affiliation:
Translational Health Research Institute, School of Medicine, Western Sydney University, Penrith, New South Wales2751, Australia Campbelltown Hospital, South West Sydney Local Health District (SWSLHD), Campbelltown, NSW 2560, Australia
Stephen Touyz
Affiliation:
Clinical Psychology Unit, School of Psychology, University of Sydney, Camperdown, New South Wales2050, Australia InsideOut Institute, Level 2, The Charles Perkins Centre, University of Sydney, Camperdown, New South Wales2006, Australia
*
*Corresponding author: Andreea I. Heriseanu, Clinical Psychology Unit, School of Psychology, University of Sydney, Level 3 M02 F, 94 Mallett Street, Camperdown, NSW2050, Australia. Email: aher4458@uni.sydney.edu.au
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Abstract

Recent models of obesity and eating behaviour have implicated both automatic responding to food-related cues and executive functioning in driving dietary choice. This study aimed to relate grazing severity to high weight with and without significant eating disorder features via the effects of inhibition and degree of goal-directed behaviour, in persons with obesity with and without significant eating disorder features compared to healthy controls. Forty-four participants with obesity (43.1% endorsing marked eating disorder features), and 43 healthy-weight age- and sex-matched participants (N = 87; 67.8% female, age = 28.57 (8.70; 18.18–58.34) years, BMI = 29.18 (7.80; 18.65–51.95) kg/m2) completed demographic and eating disorder-related questionnaires, a neuropsychological task of inhibition and an instrumental decision-making task. Bootstrapped serial mediation analyses were performed to examine the effect of group on grazing via goal-directed behaviour and inhibition. While significant differences existed between the groups in terms of inhibition, goal-directed behaviour and grazing severity, the effect of group on grazing severity was not found to be mediated by the degree of behavioural goal-directedness and inhibition. Therefore, :in persons with obesity with or without eating disorder symptoms, putative relationships between a reduced inhibitory profile and/or behaviour that is less flexible and goal-directed and eating behaviours such as grazing, remain unclear.

Keywords

grazingobesityeating disordersgoal-directed behaviourinstrumental behaviourmediation
Type
Standard Paper
Information
Behaviour Change , Volume 38 , Issue 1 , April 2021 , pp. 1 - 9
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press.

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