Visual N1 peak latency predicts individual location of point of subjective simultaneity and prior-experience in audiovisual temporal order judgments

Abstract

Event Abstract Back to Event Visual N1 peak latency predicts individual location of point of subjective simultaneity and prior-experience in audiovisual temporal order judgments Lars T. Boenke1, 2*, David Alais1 and Frank W. Ohl2, 3 1 University of Sydney, Australia 2 Leibniz Institute for Neurobiology, Germany 3 Otto-von-Guericke University, Germany The point of subjective simultaneity (PSS), derived in multisensory temporal-order judgment (TOJ) tasks, is widely believed to reflect differences between perceptual or even neural latencies in different modalities. Recently, two studies (McDonald et al 2005, Vibell et al 2007) employed ERP measurements to illuminate the physiological basis of TOJ latencies by manipulating participants’ attentional set, although results were inconclusive. Here we approach the question differently, taking advantage of a recent finding that the high inter-individual variability of PSS values in audiovisual TOJs are an inverse function of stimulus duration (Boenke et al., Exp Brain Res 2009). It was proposed this reflects a tendency in some participants to integrate an internal bias to one of the two modalities under conditions of perceptual uncertainty. Therefore, we employed a spatial TOJ task with 3 types of stimulus-pairs: auditory, visual, or auditory and visual. We were able to estimate if the PSS obtained in crossmodal trials (n-trials) can be influenced by preceding unimodal trials (n-1 trials). Results showed: 1) with short stimulus duration, the participant group expectedly showed a wide scatter of PSS-values (from negative to positive); 2) PSS values were strongly correlated with the visual P1 and visual N1 peak latencies, but not with any auditory peaks; 3) an influence of the visual n-1 trial on the cross-modal n-trial with the strength of this influence being negatively correlated with the visual N1 peak latency. Keywords: temporal order perception, Bias, visual N1, prior-experience, interindividual differences, audiovisual Conference: ACNS-2012 Australasian Cognitive Neuroscience Conference, Brisbane, Australia, 29 Nov - 2 Dec, 2012. Presentation Type: Poster Presentation Topic: Sensation and Perception Citation: Boenke LT, Alais D and Ohl FW (2012). Visual N1 peak latency predicts individual location of point of subjective simultaneity and prior-experience in audiovisual temporal order judgments. Conference Abstract: ACNS-2012 Australasian Cognitive Neuroscience Conference. doi: 10.3389/conf.fnhum.2012.208.00020 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: 14 Oct 2012; Published Online: 07 Nov 2012. * Correspondence: Mr. Lars T Boenke, University of Sydney, Sydney/Annandale, Australia, lars.boenke@gmail.com 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 Lars T Boenke David Alais Frank W Ohl Google Lars T Boenke David Alais Frank W Ohl Google Scholar Lars T Boenke David Alais Frank W Ohl PubMed Lars T Boenke David Alais Frank W Ohl 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.