Sustained target-driven interference under optimal preparation in a cued task switching paradigm using orthogonal polynomial trend analysis (OPTA)

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Event Abstract Back to Event Sustained target-driven interference under optimal preparation in a cued task switching paradigm using orthogonal polynomial trend analysis (OPTA) Alexander Provost1, Andrew Heathcote2, Scott Brown2, Sharna Jamadar3 and Frini Karayanidis1* 1 University of Newcastle, School of Psychology, Australia 2 University of Newcastle, School of Psychology, Australia 3 Monash University, School of Psychology and Psychiatry, Australia Dual process models of cognitive control posit the existence of both proactive and reactive control processes. Cued task switching paradigms have differentiated these processes by measuring ERPs linked to advance preparation during the cue-target interval (CTI) and ERPs linked to resolution of target-driven interference after target onset. Using Orthogonal Polynomial Trend Analysis (OPTA) to extract cue-locked ERP waveforms corresponding to semi-deciles of each participant’s RT distribution, Karayanidis et al. (2011, Psychophysiology, 48, 559–568) showed that proactive control involves both switch-specific and general task preparation processes. A significant residual RT switch cost remained even at the fastest semi-decile that was associated with greater proactive control, suggesting that reactive control may be required to resolve post-target interference even on optimally prepared trials. In this paper, we use OPTA to examine target-locked ERP waveforms associated with different levels of preparation. Fast ‘prepared’ switch trials (i.e., large cue-locked switch-positivity and small RT switch cost) showed no anterior N2 and a large prominent P3b. Slow ‘unprepared’ switch trials (i.e., small switch-positivity and large switch cost) showed a large anterior N2 and a very small P3b. Similar variability in N2 and P3b amplitude was evident across the RT distribution for repeat trials. At the fastest percentile, switch trials produced a larger N2 and smaller P3b than repeat trials, indicating that fully prepared switch trials continue to show greater interference than fully prepared repeat trials. These findings are consistent with the notion that proactive control can reduce but does not eliminate post-target interference for switch trials. Keywords: cognitive control, task switching, OPTA, ERP, interference control Conference: ACNS-2012 Australasian Cognitive Neuroscience Conference, Brisbane, Australia, 29 Nov - 2 Dec, 2012. Presentation Type: Oral Presentation Topic: Executive Processes Citation: Provost A, Heathcote A, Brown S, Jamadar S and Karayanidis F (2012). Sustained target-driven interference under optimal preparation in a cued task switching paradigm using orthogonal polynomial trend analysis (OPTA). Conference Abstract: ACNS-2012 Australasian Cognitive Neuroscience Conference. doi: 10.3389/conf.fnhum.2012.208.00184 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 25 Oct 2012; Published Online: 17 Nov 2012. * Correspondence: Prof. Frini Karayanidis, University of Newcastle, School of Psychology, Newcastle, NSW 2308, Australia, frini.karayanidis@newcastle.edu.au Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Alexander Provost Andrew Heathcote Scott Brown Sharna Jamadar Frini Karayanidis Google Alexander Provost Andrew Heathcote Scott Brown Sharna Jamadar Frini Karayanidis Google Scholar Alexander Provost Andrew Heathcote Scott Brown Sharna Jamadar Frini Karayanidis PubMed Alexander Provost Andrew Heathcote Scott Brown Sharna Jamadar Frini Karayanidis Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.