| The role of remote closure in the perception of occlusion at junctions and illusory contours. | |
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MedLine Citation:
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PMID: 20402238 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Abstract. Perceived occlusion at T-junctions or illusory contours at implicit T-junctions are often modelled by using edge information without surface context. We explored the effect of closure on perceived occlusion at T-junctions. Two vertical lines separated by a gap each had six abutting horizontal lines on opposite sides forming T-junctions. These lines were either closed or not closed into pairs at the stem ends of the Ts. In experiment 1, closed T-junction stems gave a much stronger sense of occlusion at the vertical lines than unclosed ones, even though closure information was remote from the putative occlusion and local T-junction information remained constant. When the outer two T-junctions were converted to L-junctions, perceived occlusion considerably diminished. The effect of closure on illusory-contour strength for stimuli like those of experiment 1 but with the vertical lines omitted was explored in experiment 2. The two sets of horizontal lines, separated by a gap, were either closed or not closed into pairs at their outer ends. Illusory-contour strength along the vertical alignments was much greater for closed pairs. Line terminations on both sides of the gap enhanced illusory-contour strength, but whether they were collinear or not had little effect. |
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Authors:
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Barbara J Gillam; Philip M Grove; Jessica Layden |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Perception Volume: 39 ISSN: 0301-0066 ISO Abbreviation: Perception Publication Date: 2010 |
Date Detail:
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Created Date: 2010-04-20 Completed Date: 2010-06-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372307 Medline TA: Perception Country: England |
Other Details:
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Languages: eng Pagination: 145-56 Citation Subset: IM |
Affiliation:
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School of Psychology, University of New South Wales (UNSW), Sydney, NSW 2052, Australia. b.gillam@unsw.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Form Perception / physiology Humans Judgment / physiology Optical Illusions* Photic Stimulation Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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