| Shape contrast: a global mechanism? | |
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MedLine Citation:
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PMID: 20837044 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We investigated whether a shape contrast bias is caused by local contrast enhancement or by a global mechanism. In a baseline condition, observers performed a shape discrimination task on an isolated hinged plane. But in the experimental conditions, five dihedral surfaces, of which we varied the dihedral angle distribution, were added on each side. Shape perception was influenced not only by the adjacent surface but also by the mean of the shape distribution in the extended surround. Thus, shape contrast is not locally determined and has to be understood from a global mechanism. We propose divisive normalization of shape signals as such a mechanism. |
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Authors:
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Katinka van der Kooij; Susan F te Pas |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-09-15 |
Journal Detail:
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Title: Vision research Volume: 50 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-08 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 2455-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Experimental Psychology, Helmholtz Institute, Universiteit Utrecht, Utrecht, The Netherlands. katinkavanderkooij@gmail.com |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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