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


Smith, JL and Smith, EA and Provost, AL and Heathcote, A, Sequence effects support the conflict theory of N2 and P3 in the Go/NoGo task, International Journal of Psychophysiology, 75, (3) pp. 217-226. ISSN 0167-8760 (2010) [Refereed Article]

DOI: doi:10.1016/j.ijpsycho.2009.11.002


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 sequence effects in both two-choice and Go/NoGo tasks 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/NoGo P3 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 conflict tasks, and the Go/NoGo task in particular.

Item Details

Item Type:Refereed Article
Research Division:Psychology
Research Group:Cognitive and computational psychology
Research Field:Decision making
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in psychology
UTAS Author:Heathcote, A (Professor Andrew Heathcote)
ID Code:98882
Year Published:2010
Web of Science® Times Cited:79
Deposited By:Medicine
Deposited On:2015-03-05
Last Modified:2015-05-11

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