| Temporal frequency modulates reaction time responses to first-order and second-order motion. | |
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MedLine Citation:
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PMID: 20718570 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the effect of temporal frequency and modulation depth on reaction times for discriminating the direction of first-order (luminance-defined) and second-order (contrast-defined) motion, equated for visibility using equal multiples of direction-discrimination threshold. Results showed that reaction times were heavily influenced by temporal frequency, especially in the case of second-order motion. At 1 Hz, reaction times were faster for first-order compared with second-order motion. As temporal frequency increased, reaction times for first-order motion decreased slightly, but those for second-order motion decreased more rapidly. At 8 Hz, reaction times for second-order motion were, in many cases, faster than those for first-order motion. Reaction times decreased as stimulus modulation depth increased at approximately the same rate for both motion types. The findings demonstrate that behavioral response latencies to first-order and second-order motion are dependent on specific stimulus parameters and may, in some cases, be shorter in response to second-order compared with first-order motion. |
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Authors:
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Claire V Hutchinson; Tim Ledgeway |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of experimental psychology. Human perception and performance Volume: 36 ISSN: 1939-1277 ISO Abbreviation: J Exp Psychol Hum Percept Perform Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-29 Completed Date: 2011-01-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7502589 Medline TA: J Exp Psychol Hum Percept Perform Country: United States |
Other Details:
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Languages: eng Pagination: 1325-32 Citation Subset: IM |
Copyright Information:
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(PsycINFO Database Record (c) 2010 APA, all rights reserved). |
Affiliation:
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School of Psychology, University of Leicester. ch190@le.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Attention* Choice Behavior Contrast Sensitivity* Discrimination (Psychology)* Female Humans Judgment Male Motion Perception* Orientation* Pattern Recognition, Visual* Psychophysics Reaction Time* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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