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| Research article summary (published 13 May 2003): |
Feedback in hypothesis testing: an ERP study.
Full Abstract
We used event-related potentials (ERPs) to probe the effects of feedback in a hypothesis testing (HT) paradigm. Thirteen college students serially tested hypotheses concerning a hidden rule by judging its presence or absence in triplets of digits and revised them on the basis of an exogenous performance feedback. ERPs time-locked to performance feedback were then examined. The results showed differences between responses to positive and negative feedback at all cortical sites. Negative feedback, indicating incorrect performance, was associated to a negative deflection preceding a P300-like wave. Spatiotemporal principal component analysis (PCA) showed the interplay between early frontal components and later central and posterior ones. Lateralization of activity was selectively detectable at frontal sites, with a left frontal dominance for both positive and negative feedback. These results are discussed in terms of a proposed computational model of trial-to-trial feedback in HT in which the cognitive and emotive aspects of feedback are explicitly linked to putative mediating brain mechanisms. The properties of different feedback types and feedback-related deficits in depression are also discussed.
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Author information
Author/s: Papo, David (D); Baudonnière, Pierre-Marie (PM); Hugueville, Laurent (L); Caverni, Jean-Paul (JP);
Affiliation: Université de Provence, Marseille Cedex 3, France. david.papo(-atsign-)chups.jussieu.fr
Journal and publication information
Publication Type: Journal Article
Journal: Journal of cognitive neuroscience (J Cogn Neurosci), published in United States. (Language: eng)
Reference: 2003-May; vol 15 (issue 4) : pp 508-22
Dates: Created 2003/06/13; Completed 2003/08/04; Revised 2004/11/17;
PMID: 12803963, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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