Volume 27, Issue 4 pp. 306-313
Research Article
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Ventral–striatal/nucleus–accumbens sensitivity to prediction errors during classification learning

P. F. Rodriguez

P. F. Rodriguez

Department of Cognitive Science, University of California, Irvine, California

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A.R. Aron

A.R. Aron

Department of Psychology, University of California, Los Angeles, California

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R.A. Poldrack

Corresponding Author

R.A. Poldrack

Department of Psychology, University of California, Los Angeles, California

Department of Psychology, Franz Hall, Box 951563, University of California, Los Angeles, CA 90065Search for more papers by this author
First published: 09 August 2005
Citations: 92

Abstract

A prominent theory in neuroscience suggests reward learning is driven by the discrepancy between a subject's expectation of an outcome and the actual outcome itself. Furthermore, it is postulated that midbrain dopamine neurons relay this mismatch to target regions including the ventral striatum. Using functional MRI (fMRI), we tested striatal responses to prediction errors for probabilistic classification learning with purely cognitive feedback. We used a version of the Rescorla-Wagner model to generate prediction errors for each subject and then entered these in a parametric analysis of fMRI activity. Activation in ventral striatum/nucleus-accumbens (Nacc) increased parametrically with prediction error for negative feedback. This result extends recent neuroimaging findings in reward learning by showing that learning with cognitive feedback also depends on the same circuitry and dopaminergic signaling mechanisms. Hum Brain Mapp, 2005. © 2005 Wiley-Liss, Inc.

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