Appetitive Pavlovian-to-Instrumental Transfer in Participants with Normal-Weight and Obesity

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http://hdl.handle.net/10138/304984

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Meemken , M-T & Horstmann , A 2019 , ' Appetitive Pavlovian-to-Instrumental Transfer in Participants with Normal-Weight and Obesity ' , Nutrients , vol. 11 , no. 5 , 1037 . https://doi.org/10.3390/nu11051037

Title: Appetitive Pavlovian-to-Instrumental Transfer in Participants with Normal-Weight and Obesity
Author: Meemken, Marie-Theres; Horstmann, Annette
Contributor: University of Helsinki, Department of Psychology and Logopedics
Date: 2019-05-09
Language: eng
Number of pages: 16
Belongs to series: Nutrients
ISSN: 2072-6643
URI: http://hdl.handle.net/10138/304984
Abstract: Altered eating behavior due to modern, food-enriched environments has a share in the recent obesity upsurge, though the exact mechanisms remain unclear. This study aims to assess whether higher weight or weight gain are related to stronger effects of external cues on motivation-driven behavior. 51 people with and without obesity completed an appetitive Pavlovian-to-Instrumental Transfer (PIT) paradigm. During training, button presses as well as presentation of fractal images resulted in three palatable and one neutral taste outcome. In the subsequent test phase, outcome-specific and general behavioral bias of the positively associated fractal images on deliberate button press were tested under extinction. While all participants showed signs of specific transfer, general transfer was not elicited. Contrary to our expectations, there was no main effect of weight group on PIT magnitude. Participants with obesity exhibited higher scores in the Three-Factor Eating Questionnaire Disinhibition scale, replicating a very robust effect from previous literature. Individual Restraint scores were able to predict body-mass index (BMI) change after a three-year period. Our data indicate that PIT is an important player in how our environment influences the initiation of food intake, but its effects alone cannot explain differences in—or future development of—individual weight.
Subject: 515 Psychology
Pavlovian-to-Instrumental Transfer
PIT
obesity
food reward
human
GOAL-DIRECTED ACTION
FOOD-CUE EXPOSURE
INDIVIDUAL-DIFFERENCES
DIETARY RESTRAINT
ATTENTION BIAS
DRUG-SEEKING
REWARD CUES
HABITS
IMAGES
DISINHIBITION
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