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

journal contribution
posted on 2023-05-18, 08:07 authored by Smith, JL, Smith, EA, Provost, AL, Heathcote, A
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.

History

Publication title

International Journal of Psychophysiology

Volume

75

Pagination

217-226

ISSN

0167-8760

Department/School

Tasmanian School of Medicine

Publisher

Elsevier Science Bv

Place of publication

Po Box 211, Amsterdam, Netherlands, 1000 Ae

Repository Status

  • Restricted

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Expanding knowledge in psychology

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