| An empirical explanation of aperture effects. | |
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MedLine Citation:
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PMID: 19114661 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The perceived direction of a moving line changes, often markedly, when viewed through an aperture. Although several explanations of this remarkable effect have been proposed, these accounts typically focus on the percepts elicited by a particular type of aperture and offer no biological rationale. Here, we test the hypothesis that to contend with the inherently ambiguous nature of motion stimuli the perceived direction of objects moving behind apertures of different shapes is determined by a wholly empirical strategy of visual processing. An analysis of moving line stimuli generated by objects projected through apertures shows that the directions of motion subjects report in psychophysical testing is accounted for by the frequency of occurrence of the 2D directions of stimuli generated by simulated 3D sources. The completeness of these predictions supports the conclusion that the direction of perceived motion is fully determined by accumulated behavioral experience with sources whose physical motions cannot be conveyed by image sequences as such. |
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Authors:
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Kyongje Sung; William T Wojtach; Dale Purves |
Publication Detail:
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Type: Journal Article Date: 2008-12-29 |
Journal Detail:
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Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 106 ISSN: 1091-6490 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2009-01-07 Completed Date: 2009-02-13 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
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Languages: eng Pagination: 298-303 Citation Subset: IM |
Affiliation:
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Center for Cognitive Neuroscience and Department of Neurobiology, Duke University, Box 90999, Durham, NC 27708, USA. k.sung@duke.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Depth Perception Empirical Research Humans Motion Perception* |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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