A model-based comparison of three theories of audiovisual temporal recalibration

Abstract

Event Abstract Back to Event A model-based comparison of three theories of audiovisual temporal recalibration Kielan Yarrow1* and Shora Minaei1 1 City University London, Psychology, U.K. When exposed to a series of asynchronous adaptors (for example audiovisual events) observers' temporal judgements have been shown to recalibrate. The mechanism of this recalibration is currently debated. Three broad explanations have been suggested. According to the first, the time it takes for sensory signals to propagate through the brain has changed, affecting the relative headstart of one modality compared to the other/s. The second explanation suggests that the decision criteria we use to interpret relative time have changed, but not the perception of time itself. A final possibility is that a population of neurones collectively encode relative times, and that the balance of responses in this population has been changed (without any concurrent change in the way the population is being decoded to produce a decision). Here, we tested four adaptation conditions: No adaptation, synchronous adaptation, and negative/positive adaptation at the low/high decision criteria for simultaneity respectively. These conditions were selected because the three explanations for recalibration generate contrasting patterns of predictions about how simultaneity judgements should vary across them. We simplified each explanation to its core features in order to produce three corresponding six-parameter models, one per explanation, which were then fitted to all four conditions at once in order to assess goodness of fit. Our data suggest that, considered in isolation, the time shift and criterion shift accounts are better able to explain subjective reports about simultaneity than the population code model. Keywords: adaptation, audiovisual, temporal recalibration, synchrony, SJ Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Sensation and Perception Citation: Yarrow K and Minaei S (2015). A model-based comparison of three theories of audiovisual temporal recalibration. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00390 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: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Dr. Kielan Yarrow, City University London, Psychology, London, U.K., kielan.yarrow.1@city.ac.uk 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 Kielan Yarrow Shora Minaei Google Kielan Yarrow Shora Minaei Google Scholar Kielan Yarrow Shora Minaei PubMed Kielan Yarrow Shora Minaei 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.