Mediofrontal event-related potentials in response to positive, negative and unsigned prediction errors

Sambrook, Thomas D. and Goslin, Jeremy (2014) Mediofrontal event-related potentials in response to positive, negative and unsigned prediction errors. Neuropsychologia, 61. pp. 1-10. ISSN 0028-3932

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Abstract

Reinforcement learning models make use of reward prediction errors (RPEs), the difference between an expected and obtained reward. There is evidence that the brain computes RPEs, but an outstanding question is whether positive RPEs ("better than expected") and negative RPEs ("worse than expected") are represented in a single integrated system. An electrophysiological component, feedback related negativity, has been claimed to encode an RPE but its relative sensitivity to the utility of positive and negative RPEs remains unclear. This study explored the question by varying the utility of positive and negative RPEs in a design that controlled for other closely related properties of feedback and could distinguish utility from salience. It revealed a mediofrontal sensitivity to utility, for positive RPEs at 275310 ms and for negative RPEs at 310-390 ms. These effects were preceded and succeeded by a response consistent with an unsigned prediction error, or "salience" coding. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: feedback related negativity (frn),event-related potential (erp),reward prediction error (rpe),unsigned prediction error,saliency,dopamine
Faculty \ School: Faculty of Social Sciences > School of Psychology
Depositing User: Pure Connector
Date Deposited: 29 Sep 2017 05:06
Last Modified: 31 Oct 2019 15:18
URI: https://ueaeprints.uea.ac.uk/id/eprint/64998
DOI: 10.1016/j.neuropsychologia.2014.06.004

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