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The size-distance paradox is a cognitive phenomenon

Mon-Williams, M. and Tresilian, J.R. (1999) The size-distance paradox is a cognitive phenomenon. Experimental Brain Research, 126 (4). pp. 578-582. ISSN 0014-4819

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Abstract

The perceived size of a fixated object is known to be a function of the perceived fixation distance. The size-distance paradox has been posited as evidence that the perceived distance of a fixated object is, in turn, influenced by the object’s perceived size. If this is correct then it challenges a widely accepted account (modified weak fusion) of how the nervous system combines multiple sources of information. We hypothesised that the influence of perceived size on the perception of distance is likely to be restricted to conscious perceptual judgements. If our hypothesis is correct then the size-distance paradox should not be observed when observers make action-based distance judgements. In line with this expectation we observed the size-distance paradox when participants made verbal reports on target distance but found no paradoxical judgements in a group who were asked to point at the target. We therefore suggest that the size-distance paradox should not be taken as evidence that perceived size feeds back into distance perception.

Item Type: Article
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Medicine and Health (Leeds) > Institute of Psychological Sciences (Leeds) > Cognitive Psychology (Leeds)
Depositing User: Repository Officer
Date Deposited: 26 Jun 2009 08:47
Last Modified: 29 Sep 2010 14:24
Published Version: http://dx.doi.org/10.1007/s002210050766
Status: Published
Publisher: Springer Verlag
Identification Number: 10.1007/s002210050766
URI: http://eprints.whiterose.ac.uk/id/eprint/8695

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