| Temporal facilitation for moving stimuli is independent of changes in direction. | |
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MedLine Citation:
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PMID: 11090675 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A flash that is presented aligned with a moving stimulus appears to lag behind the position of the moving stimulus. This flash-lag phenomenon reflects a processing advantage for moving stimuli (Metzger, W. (1932) Psychologische Forschung 16, 176-200; MacKay, D. M. (1958) Nature 181, 507-508; Nijhawan, R. (1994) Nature 370, 256-257; Purushothaman, G., Patel, S.S., Bedell, H.E., & Ogmen, H. (1998) Nature 396, 424; Whitney, D. & Murakami, I. (1998) Nature Neuroscience 1, 656-657). The present study measures the sensitivity of the illusion to unpredictable changes in the direction of motion. A moving stimulus translated upwards and then made a 90 degrees turn leftward or rightward. The flash-lag illusion was measured and it was found that, although the change in direction was unpredictable, the flash was still perceived to lag behind the moving stimulus at all points along the trajectory, a finding that is at odds with the extrapolation hypothesis (Nijhawan, R. (1994) Nature 370, 256-257). The results suggest that there is a shorter latency of the neural response to motion even during unpredictable changes in direction. The latency facilitation therefore appears to be omnidirectional rather than specific to a predictable path of motion (Grzywacz, N. M. & Amthor, F. R. (1993) Journal of Neurophysiology 69, 2188-2199). |
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Authors:
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D Whitney; P Cavanagh; I Murakami |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Review |
Journal Detail:
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Title: Vision research Volume: 40 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 2000 |
Date Detail:
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Created Date: 2001-01-24 Completed Date: 2001-01-26 Revised Date: 2006-11-15 |
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: 3829-39 Citation Subset: IM |
Affiliation:
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Vision Sciences Laboratory, Harvard University, 33 Kirkland Street, 02138, Cambridge, MA, USA. whitney@wjh.harvard.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Humans Lighting Male Motion Perception / physiology* Optical Illusions Psychometrics Reaction Time Visual Cortex / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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