Mechanisms underlying sequence effects in the stroop task

Abstract

Event Abstract Back to Event Mechanisms underlying sequence effects in the stroop task Monicque Lorist1* 1 Department of Experimental Psychology, University of Groningen, Netherlands Not only congruency of the current trial affects performance in a Stroop task. Congruency of the preceding stimulus was found to modulate the processing of the current stimulus, as well. Sequential trial effects have been explained by top-down adjustments in cognitive control processes or by bottom-up associative priming mechanisms. In this study performance and related brain activity were measured during Stroop task performance in order to examine the contribution of conflict control elicited by incongruent colour and word meaning and the formation of stimulus–response associations to sequential trial effects. As expected, faster responses and lower error rates were observed in congruent Stroop trials compared to incongruent trials. Moreover, we confirmed that performance in the Stroop task is strongly modulated by stimulus history. These sequential trial effects were dependent on the stimulus features that were repeated. For example, congruency of the previous trial induced adjustments in information processing, except for trials in which the relevant stimulus feature (i.e. colour of the Stroop word) was repeated. In this condition a clear beneficial effect on performance efficiency was observed independent of congruency of the previous stimulus. Available models explaining sequence effects based on single stimulus features seem to fall short in explaining these effects. Performance seems to be modulated by the kind of information available; dependent on this information, top-down adjustments in cognitive control processes will be made and/or changes might be implemented via bottom-up mechanisms, resulting in differential effects of cognitive conflict and repetition priming on subsequent performance. Keywords: Attention, Stroop Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Neurophysiology of Cognition and Attention Citation: Lorist M (2011). Mechanisms underlying sequence effects in the stroop task. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00317 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: 22 Nov 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Monicque Lorist, Department of Experimental Psychology, University of Groningen, Groningen, Netherlands, m.m.lorist@rug.nl 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 Monicque Lorist Google Monicque Lorist Google Scholar Monicque Lorist PubMed Monicque Lorist 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.