Sequence effects support the conflict theory of N2 and P3 in the Go/NoGo task

Title: Sequence effects support the conflict theory of N2 and P3 in the Go/NoGo task
Creator: Smith, Janette L.; Smith, Elizabeth A.; Provost, Alexander L.; Heathcote, Andrew
Relation: International Journal of Psychophysiology Vol. 75, Issue 3, p. 217-226
Publisher Link: http://dx.doi.org/10.1016/j.ijpsycho.2009.11.002
Publisher: Elsevier
Resource Type: journal article
Date: 2010
Description: In two-choice tasks the preceding sequence of stimuli robustly influences both the P3 ERP component and reaction time (RT) to the current stimulus. We examined sequenceeffects in both two-choice and Go/NoGotasks to distinguish between inhibition and conflict accounts of the N2 and P3 components. RT results suggested similar subjective expectancies were generated in the Go/NoGo and two-choice task. N2 was increased for all unexpected stimuli, even when no response inhibition was required, consistent with a conflict interpretation. The Go/NoGoP3 results also suggested a conflict explanation, and that this conflict was reduced if the response had been recently performed. These results support a reconsideration of the roles of N2 and P3 in all inhibition and conflicttasks, and the Go/NoGotask in particular.
Subject: N2; P3; Go/NoGo; sequence effects; response competition; conflict
Identifier: http://hdl.handle.net/1959.13/929803
Identifier: uon:10687
Identifier: ISSN:0167-8760
Language: eng
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