| Discrimination and identification of periodic motion trajectories. | |
MedLine Citation:
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PMID: 21750306 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Humans are extremely sensitive to radial deformations of static circular contours (F. Wilkinson, H. R. Wilson, & C. Habak, 1998). Here, we investigate detection and identification of periodic motion trajectories defined by these radial frequency (RF) patterns over a range of radial frequencies of 2-5 cycles. We showed that the average detection thresholds for RF trajectories range from 1 to 4 min of arc and performance improves as a power-law function of radial frequency. RF trajectories are also detected for a range of speeds. We also showed that spatiotemporal global processing is involved in trajectory detection, as improvement in detection performance with increasing radial deformation displayed cannot be accounted for by local probability summation. Finally, identification of RF trajectories is possible over this RF range. Overall thresholds are about 6 times higher than previously reported for static stimuli. These novel stimuli should be a useful tool to investigate motion trajectory learning and discrimination in humans and other primates. |
Authors:
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Charles C-F Or; Michel Thabet; Frances Wilkinson; Hugh R Wilson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2011-07-12 |
Journal Detail:
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Title: Journal of vision Volume: 11 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2011 |
Date Detail:
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Created Date: 2011-07-13 Completed Date: 2011-11-18 Revised Date: 2013-01-09 |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: - Citation Subset: IM |
Affiliation:
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Centre for Vision Research, York University, Toronto, ON, Canada. cfor@yorku.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Discrimination (Psychology) / physiology* Humans Models, Theoretical Motion Perception / physiology* Periodicity* Photic Stimulation / methods* Sensory Thresholds / physiology* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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//Canadian Institutes of Health Research |
| Comments/Corrections | |
Erratum In:
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J Vis. 2011;11(9). doi: 10.1167/11.9.8 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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