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A dual-process approach to exploring the role of delay discounting in obesity

Menna Price Orcid Logo, Suzanne Higgs, James Maw, Michelle Lee Orcid Logo

Physiology & Behavior, Volume: 162, Pages: 46 - 51

Swansea University Authors: Menna Price Orcid Logo, Michelle Lee Orcid Logo

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DOI (Published version): 10.1016/j.physbeh.2016.02.020

Abstract

Delay discounting of financial rewards has been related to overeating and obesity. Neuropsychological evidence supports a dual-system account of both discounting and overeating behaviour where the degree of impulsive decision making is determined by the relative strength of reward desire and executi...

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Published in: Physiology & Behavior
ISSN: 00319384
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa26525
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first_indexed 2016-03-01T02:00:08Z
last_indexed 2020-09-09T02:44:14Z
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spelling 2020-09-08T09:17:44.6556501 v2 26525 2016-02-29 A dual-process approach to exploring the role of delay discounting in obesity e8d0f85a0d2762328c906c75b1d154b7 0000-0002-0025-0881 Menna Price Menna Price true false 503d8657d47c066ada31f344b030c352 0000-0002-1291-5895 Michelle Lee Michelle Lee true false 2016-02-29 HPS Delay discounting of financial rewards has been related to overeating and obesity. Neuropsychological evidence supports a dual-system account of both discounting and overeating behaviour where the degree of impulsive decision making is determined by the relative strength of reward desire and executive control. A dual-parameter model of discounting behaviour is consistent with this theory. In this study, the fit of the commonly used one-parameter model was compared to a new dual-parameter model for the first time in a sample of adults with wide ranging BMI. Delay discounting data from 79 males and females (Males=26) across a wide age (M=28.44 years (SD=8.81)) and BMI range (M=25.42 (SD=5.16)) was analysed. A dual-parameter model (saturating-hyperbolic; Doya, 2008) was applied to the data and compared on model fit indices to the single-parameter model. Discounting was significantly greater in the overweight/obese participants using both models, however, the two parameter model showed a superior fit to data (p<.0001). The two parameters were shown to be related yet distinct measures consistent with a dual-system account of inter-temporal choice behaviour.The dual-parameter model showed superior fit to data and the two parameters were shown to be related yet distinct indices sensitive to differences between weight groups. Findings are discussed in terms of the impulsive reward and executive control systems that contribute to unhealthy food choice and within the context of obesity related research. Journal Article Physiology & Behavior 162 46 51 00319384 Obesity, delay discounting, dual-process, two-parameter, model 1 8 2016 2016-08-01 10.1016/j.physbeh.2016.02.020 Available online 13 February 2016 COLLEGE NANME Psychology COLLEGE CODE HPS Swansea University 2020-09-08T09:17:44.6556501 2016-02-29T15:16:59.9630821 Faculty of Medicine, Health and Life Sciences School of Psychology Menna Price 0000-0002-0025-0881 1 Suzanne Higgs 2 James Maw 3 Michelle Lee 0000-0002-1291-5895 4 0026525-29022016151906.pdf PriceADualProcessApproach2016.pdf 2016-02-29T15:19:06.0900000 Output 587125 application/pdf Accepted Manuscript true 2017-02-13T00:00:00.0000000 true
title A dual-process approach to exploring the role of delay discounting in obesity
spellingShingle A dual-process approach to exploring the role of delay discounting in obesity
Menna Price
Michelle Lee
title_short A dual-process approach to exploring the role of delay discounting in obesity
title_full A dual-process approach to exploring the role of delay discounting in obesity
title_fullStr A dual-process approach to exploring the role of delay discounting in obesity
title_full_unstemmed A dual-process approach to exploring the role of delay discounting in obesity
title_sort A dual-process approach to exploring the role of delay discounting in obesity
author_id_str_mv e8d0f85a0d2762328c906c75b1d154b7
503d8657d47c066ada31f344b030c352
author_id_fullname_str_mv e8d0f85a0d2762328c906c75b1d154b7_***_Menna Price
503d8657d47c066ada31f344b030c352_***_Michelle Lee
author Menna Price
Michelle Lee
author2 Menna Price
Suzanne Higgs
James Maw
Michelle Lee
format Journal article
container_title Physiology & Behavior
container_volume 162
container_start_page 46
publishDate 2016
institution Swansea University
issn 00319384
doi_str_mv 10.1016/j.physbeh.2016.02.020
college_str Faculty of Medicine, Health and Life Sciences
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hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str School of Psychology{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}School of Psychology
document_store_str 1
active_str 0
description Delay discounting of financial rewards has been related to overeating and obesity. Neuropsychological evidence supports a dual-system account of both discounting and overeating behaviour where the degree of impulsive decision making is determined by the relative strength of reward desire and executive control. A dual-parameter model of discounting behaviour is consistent with this theory. In this study, the fit of the commonly used one-parameter model was compared to a new dual-parameter model for the first time in a sample of adults with wide ranging BMI. Delay discounting data from 79 males and females (Males=26) across a wide age (M=28.44 years (SD=8.81)) and BMI range (M=25.42 (SD=5.16)) was analysed. A dual-parameter model (saturating-hyperbolic; Doya, 2008) was applied to the data and compared on model fit indices to the single-parameter model. Discounting was significantly greater in the overweight/obese participants using both models, however, the two parameter model showed a superior fit to data (p<.0001). The two parameters were shown to be related yet distinct measures consistent with a dual-system account of inter-temporal choice behaviour.The dual-parameter model showed superior fit to data and the two parameters were shown to be related yet distinct indices sensitive to differences between weight groups. Findings are discussed in terms of the impulsive reward and executive control systems that contribute to unhealthy food choice and within the context of obesity related research.
published_date 2016-08-01T03:31:50Z
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