@misc{10481/95616,
year = {2016},
month = {6},
url = {https://hdl.handle.net/10481/95616},
abstract = {Background
The negative consequences of energy dense foods are well known, yet people increasingly
make unhealthy food choices leading to obesity (i.e., risky decisions). The aims of this study
were: [1] to compare performance in decision-making tasks under risk and under ambiguity
between individuals with obesity, overweight and normal weight; [2] to examine the associations
between body mass index (BMI) and decision-making, and the degree to which these
associations are modulated by reward sensitivity.
Methods
Seventy-nine adults were recruited and classified in three groups according to their BMI: obesity,
overweight and normal-weight. Groups were similar in terms of age, education and
socio-economic status, and were screened for comorbid medical and mental health conditions.
Decision-making under risk was measured via theWheel of Fortune Task (WoFT) and
decision-making under ambiguity via the Iowa Gambling Task (IGT). Reward sensitivity was
indicated by the Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ).
Results
Individuals with obesity made riskier choices in the WoFT, specifically in choices with an
expected value close to zero and in the propensity to risk index. No differences were found
in IGT performance or SPSRQ scores. BMI was associated with risk-taking (WoFT performance),
independently of reward sensitivity.
Conclusions
Obesity is linked to a propensity to make risky decisions in experimental conditions analogous
to everyday food choices.},
organization = {Grants HUM-6635 (NEUROECOBE) from the Andalusian Council
of Innovation, Science and Industry},
organization = {RETICS from the
Instituto de Salud Carlos III and co-funded by FEDER
funds -a way to build Europe-},
organization = {“Translational
discovery laboratory for brain mechanisms of food
choice and obesity” from the Ian Potter Foundation to
AVG},
organization = {Predoctoral fellowship of
the Spanish Ministry of Education, Culture and
Sports, FPU Program, (FP13/00669)},
organization = {Grant PSI2013-45055 (G-BRAIN) from the
Spanish Ministry of Economy and Competitiveness},
organization = {Grant FIS PI14/00290},
organization = {Grant CIBERobn from the Instituto de Salud Carlos III
and co-funded by FEDER funds—a way to build
Europe-},
publisher = {Plos One},
title = {Altered Decision-Making under Risk in Obesity},
doi = {10.1371/journal.pone.0155600},
author = {Navas, Juan F. and Vilar López, Raquel and Perales López, José César and Steward, Trevor and Fernández Aranda, Fernando and Verdejo García, Antonio Javier},
}