Document Detail

Temporal dynamics of prediction error processing during reward-based decision making.
MedLine Citation:
PMID:  20510376     Owner:  NLM     Status:  MEDLINE    
Adaptive decision making depends on the accurate representation of rewards associated with potential choices. These representations can be acquired with reinforcement learning (RL) mechanisms, which use the prediction error (PE, the difference between expected and received rewards) as a learning signal to update reward expectations. While EEG experiments have highlighted the role of feedback-related potentials during performance monitoring, important questions about the temporal sequence of feedback processing and the specific function of feedback-related potentials during reward-based decision making remain. Here, we hypothesized that feedback processing starts with a qualitative evaluation of outcome-valence, which is subsequently complemented by a quantitative representation of PE magnitude. Results of a model-based single-trial analysis of EEG data collected during a reversal learning task showed that around 220ms after feedback outcomes are initially evaluated categorically with respect to their valence (positive vs. negative). Around 300ms, and parallel to the maintained valence-evaluation, the brain also represents quantitative information about PE magnitude, thus providing the complete information needed to update reward expectations and to guide adaptive decision making. Importantly, our single-trial EEG analysis based on PEs from an RL model showed that the feedback-related potentials do not merely reflect error awareness, but rather quantitative information crucial for learning reward contingencies.
Marios G Philiastides; Guido Biele; Niki Vavatzanidis; Philipp Kazzer; Hauke R Heekeren
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-25
Journal Detail:
Title:  NeuroImage     Volume:  53     ISSN:  1095-9572     ISO Abbreviation:  Neuroimage     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-08-02     Completed Date:  2011-01-04     Revised Date:  2014-03-25    
Medline Journal Info:
Nlm Unique ID:  9215515     Medline TA:  Neuroimage     Country:  United States    
Other Details:
Languages:  eng     Pagination:  221-32     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Inc. All rights reserved.
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MeSH Terms
Choice Behavior / physiology*
Decision Making / physiology*
Electroencephalography / methods*
Feedback, Physiological / physiology
Task Performance and Analysis*

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