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Event-related potentials reveal an early advantage for luminance contours in the processing of objects

Martinovic, J and Mordal, J and Wuerger, SM (2011) 'Event-related potentials reveal an early advantage for luminance contours in the processing of objects.' Journal of Vision, 11 (7). p. 1. ISSN 1534-7362

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Experimental investigations of cue combination typically assume that individual cues provide noisy but unbiased sensory information about world properties. However, in numerous instances, including real-world settings, observers systematically misestimate properties of the world from sensory information. Two such instances are the estimation of shape from stereo and motion cues. Bias in single-cue estimates, therefore poses a problem for cue combination if the visual system is to maintain accuracy with respect to the world, particularly because knowledge about the magnitude of bias in individual cues is typically unknown. Here, we show that observers fail to take account of the magnitude of bias in each cue during combination and instead combine cues in proportion to their reliability so as to increase the precision of the combined-cue estimate. This suggests that observers were unaware of the bias in their sensory estimates. Our analysis of cue combination shows that there is a definable range of circumstances in which combining information from biased cues, rather than vetoing one or other cue, can still be beneficial, by reducing error in the final estimate. © ARVO.

Item Type: Article
Uncontrolled Keywords: 3D surface and shape perception; binocular vision; depth
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 31 Jul 2013 13:41
Last Modified: 18 Aug 2022 13:04

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