| Properties of the recombination of one-dimensional motion signals into a pattern motion signal. | |
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MedLine Citation:
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PMID: 1437474 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We have examined the human ability to determine the direction of movement of a variety of plaid patterns. The plaids were composed of two orthogonal sine-wave gratings. When the plaid components are of unequal spatial frequency or sometimes of unequal contrast, observers judge the direction of movement incorrectly. In terms of the two-stage model of Adelson and Movshon (1982), these errors may result from either a misjudgment in the perceived speeds of each of the components or a failure in the combination of one-dimensional component movements into a coherent direction of motion of the two-dimensional plaid pattern, or both. A comparison of the perceived direction of motion of plaids with the relative perceived speeds of the plaid component gratings suggest that both failures occur, but in different circumstances. The relative perceived speed of the plaid components was measured with a spatial and a temporal forced-choice technique, the former leading to larger differences. Our results support the notion that the visual system decomposes a moving plaid into oriented components and subsequently recombines the component motions. |
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Authors:
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F L Kooi; K K De Valois; D H Grosof; R L De Valois |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Perception & psychophysics Volume: 52 ISSN: 0031-5117 ISO Abbreviation: Percept Psychophys Publication Date: 1992 Oct |
Date Detail:
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Created Date: 1992-12-09 Completed Date: 1992-12-09 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0200445 Medline TA: Percept Psychophys Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 415-24 Citation Subset: C |
Affiliation:
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University of California, Berkeley. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Discrimination Learning Female Humans Male Motion Perception* Optical Illusions* Orientation* Pattern Recognition, Visual* Psychophysics |
| Grant Support | |
ID/Acronym/Agency:
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EY00014/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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