| Perceived direction of moving two-dimensional patterns depends on duration, contrast and eccentricity. | |
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MedLine Citation:
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PMID: 1502799 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Type II two-dimensional motion is produced by superimposing two one-dimensional drifting cosine gratings with velocity vectors lying on the same side of the intersection-of-constraints (IOC) resultant. When type II patterns were constructed with components having the same spatial frequency and contrast, perceived direction was found to be biased toward the vector sum direction at short durations and approached the direction predicted by IOC only after some time lag. This time lag was contrast dependent. At 5% contrast, the perceived direction after 1 sec of presentation remained biased by more than 20 degrees. Direction perception was also measured at 15 degrees eccentricity. At this eccentricity the perceived direction of type II patterns was grossly biased away from the IOC prediction in the direction of the component vectors by an average of 25 degrees. |
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Authors:
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C Yo; H R Wilson |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Vision research Volume: 32 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 1992 Jan |
Date Detail:
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Created Date: 1992-09-17 Completed Date: 1992-09-17 Revised Date: 2007-11-14 |
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: 135-47 Citation Subset: IM; S |
Affiliation:
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Department of Ophthalmology and Visual Science, University of Chicago, IL 60637. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Contrast Sensitivity
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physiology* Depth Perception / physiology Fovea Centralis / physiology Humans Male Motion Perception / physiology* Pattern Recognition, Visual / physiology* Sensory Thresholds / physiology Time Factors Visual Acuity / physiology Visual Fields / physiology |
| Grant Support | |
ID/Acronym/Agency:
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5T32 GM07281/GM/NIGMS NIH HHS; EY02158/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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