English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Reliance on model-based and model-free control in obesity

Janssen, L., Mahner, F., Schlagenhauf, F., Deserno, L., & Horstmann, A. (2019). Reliance on model-based and model-free control in obesity. PsyArXiv. doi:10.31234/osf.io/6s47t.

Item is

Files

show Files
hide Files
:
Janssen_Preprint_2019.pdf (Preprint), 2MB
Name:
Janssen_Preprint_2019.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Janssen, Lieneke1, 2, Author              
Mahner, Florian1, Author
Schlagenhauf, Florian1, 3, Author              
Deserno, Lorenz1, 2, 4, 5, Author              
Horstmann, Annette1, 2, 6, Author              
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Integrated Research and Treatment Center Adiposity Diseases, Leipzig University Medical Center, Germany, ou_persistent22              
3Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité – Universitätsmedizin Berlin, Germany, ou_persistent22              
4Max Planck UCL Centre for Computational Psychiatry and Ageing Research, University College London, United Kingdom, ou_persistent22              
5The Wellcome Centre for Human Neuroimaging, University College London, United Kingdom, ou_persistent22              
6 Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Consuming more energy than is expended may reflect a failure of control over eating behaviour in obesity. Behavioural control arises from a balance between two dissociable strategies of reinforcement learning: model-free and model-based. We hypothesized that weight status relates to an imbalance in reliance on model-based and model-free control, and that it may do so in a linear or quadratic manner. To test this, 90 healthy participants in a wide BMI range (normal-weight (n=31), overweight (n=29), obese (n=30)) performed a sequential decision-making task. The primary analysis indicated that obese participants relied less on model-based control than overweight and normal-weight participants, with no difference between overweight and normal-weight participants. In line, secondary continuous analyses revealed a negative linear, but not quadratic, relationship between BMI and model-based control. Computational modelling of choice behaviour suggested that a mixture of both strategies was shifted towards less model-based control in obese participants. Furthermore, exploratory analyses of separate weights for model-free and model-based control showed stronger reliance on model-free control with increased BMI. Our findings suggest that obesity may indeed be related to an imbalance in behavioural control as expressed in a phenotype of less model-based control potentially resulting from enhanced reliance on model-free computations.

Details

show
hide
Language(s): eng - English
 Dates: 2019-07-17
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: DOI: 10.31234/osf.io/6s47t
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: PsyArXiv
Source Genre: Web Page
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -