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Journal Article

Citation

Karayanidis F, Provost A, Brown S, Paton B, Heathcote A. Psychophysiology 2011; 48(4): 559-568.

Copyright

(Copyright © 2011, Society for Psychophysiological Research, Publisher John Wiley and Sons)

DOI

10.1111/j.1469-8986.2010.01115.x

PMID

unavailable

Abstract

We examined whether the cue‐locked centroparietal positivity is associated with switch‐specific or general preparation processes. If this positivity (300–400 ms) indexes switch‐specific preparation, faster switch trials associated with smaller RT switch cost should have a larger positivity as compared to slower switch trials, but no such association should be evident for repeat trials. We extracted ERP waveforms corresponding to semi‐deciles of each participant's RT distribution (i.e., fastest to slowest 5% of trials) for switch and repeat conditions. Consistent with a switch‐specific preparation process, centroparietal positivity amplitude was linked to slower RT and larger RT switch cost for switch but not repeat trials. A later pre‐target negativity (500–600 ms) was inversely correlated with RT for both switch and repeat trials, consistent with a general anticipatory preparation processes.

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