Event Abstract Back to Event Shape aftereffects reflect a weighted function of retinal and surface slant information Katherine R. Storrs1* and Derek H. Arnold1 1 University of Queensland, School of Psychology, Australia Sensory aftereffects are generally attributed to neural adaptation and are ubiquitous in vision. One of the oldest examples is the shape aftereffect, wherein exposure to a particular shape makes subsequent shapes seem oppositely distorted. For example, after looking at a narrow ellipse, a perfect circle can appear as a squashed ellipse. Shape aftereffects have been linked to V4 activity, where shape is hypothetically encoded by the position and magnitude of points of maximal local curvature. Models based on this can achieve size and position invariance, both established properties of the shape aftereffect. However, a single perceived shape can result from many different retinal images, with different local curvatures. Shape constancy calculations enable accurate shape perception by discounting these differences, but are not included in our current understanding of shape aftereffects. I will present data demonstrating that shape aftereffects can follow perceived shape, rather than retinal dimensions, and that they therefore reflect the computations that weight retinal and surface slant information to achieve shape constancy. This places the neural substrate for shape aftereffects at higher level of the visual hierarchy than previously thought. Keywords: adaptation, Aftereffects, Shape Perception, shape constancy, mid-level vision Conference: ACNS-2012 Australasian Cognitive Neuroscience Conference, Brisbane, Australia, 29 Nov - 2 Dec, 2012. Presentation Type: Oral Presentation Topic: Sensation and Perception Citation: Storrs KR and Arnold DH (2012). Shape aftereffects reflect a weighted function of retinal and surface slant information . Conference Abstract: ACNS-2012 Australasian Cognitive Neuroscience Conference. doi: 10.3389/conf.fnhum.2012.208.00177 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: Ms. Katherine R Storrs, University of Queensland, School of Psychology, St Lucia, Australia, katherine.storrs@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 Katherine R Storrs Derek H Arnold Google Katherine R Storrs Derek H Arnold Google Scholar Katherine R Storrs Derek H Arnold PubMed Katherine R Storrs Derek H Arnold 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.