Sequential event structures, single-trial fluctuations in p3 amplitudes, and dynamic changes of surprise

Abstract

Event Abstract Back to Event Sequential event structures, single-trial fluctuations in p3 amplitudes, and dynamic changes of surprise Bruno Kopp1*, Karl Wessel1 and Tim Fingscheidt2 1 Klinikum Braunschweig, Germany 2 University of Technology Braunschweig, Germany Mars et al. (2008) presented a model of processes underlying the generation of the P3 in which trial-by-trial changes in P3 amplitudes were explained in terms of an ideal Bayesian observer keeping track of the global probabilities of possible events. Our subjects (n = 16) performed a classical two-stimulus oddball task, while we recorded their brain responses using electroencephalography (EEG). The probabilities of stimulus occurrence were manipulated (p = .5/.5 and p = .3/.7). Grand-average waveforms, individual average waveforms as well as trial-by-trial variations in the amplitudes of the P3 component were strongly influenced by local sequential event structures. Specifically, P3 amplitudes showed sensitivity to variations in the number of presentations of the eliciting stimulus within the series of trials which preceded the eliciting event (Squires et al., 1976). The ideal Bayesian observer model of the generation of the P3 (Mars et al., 2008) cannot account for the effects of the local stimulus sequence on the amplitudes of the P3 component. We conclude that the model needs to be extended to include information about the sequential delivery of stimuli during the recent past prior to the eliciting event. Keywords: Cognition, EEG 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: Kopp B, Wessel K and Fingscheidt T (2011). Sequential event structures, single-trial fluctuations in p3 amplitudes, and dynamic changes of surprise. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00441 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 Nov 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Bruno Kopp, Klinikum Braunschweig, Braunschweig, Germany, kopp.bruno@mh-hannover.de 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 Bruno Kopp Karl Wessel Tim Fingscheidt Google Bruno Kopp Karl Wessel Tim Fingscheidt Google Scholar Bruno Kopp Karl Wessel Tim Fingscheidt PubMed Bruno Kopp Karl Wessel Tim Fingscheidt 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.