| New binary direction aftereffect does not add up. | |
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MedLine Citation:
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PMID: 17209747 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Neural adaptation and inhibition are pervasive characteristics of the primate brain and are probably understood better within the context of visual processing than with any other sensory modality. These processes are thought to underlie illusions in which one motion affects the perceived direction of another, such as the direction aftereffect (DAE) and direction repulsion. The DAE describes how, following prolonged viewing of motion in one direction, the direction of a subsequently viewed test pattern is misperceived. In the case of direction repulsion, the direction difference between two transparently moving surfaces is overestimated. Explanations of the DAE appeal to neural adaptation, whereas direction repulsion is accounted for through lateral inhibition. Here, we report on a new illusion, the binary DAE (bDAE), in which superimposed slow and fast dots moving in the same direction are perceived to move in different directions following adaptation to a mixed-speed stimulus. This new phenomenon is essentially a combination of the DAE and direction repulsion. Interestingly, the magnitude of the bDAE is greater than would be expected simply through a linear combination of the DAE and direction repulsion, suggesting that the mechanisms underlying these two phenomena interact in a nonlinear fashion. |
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Authors:
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William Curran; Colin W G Clifford; Christopher P Benton |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-12-18 |
Journal Detail:
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Title: Journal of vision Volume: 6 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2006 |
Date Detail:
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Created Date: 2007-01-09 Completed Date: 2007-01-26 Revised Date: 2008-04-29 |
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: 1451-8 Citation Subset: IM |
Affiliation:
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School of Psychology, Queen's University of Belfast, Belfast, United Kingdom. w.curran@qub.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Artifacts Attention Figural Aftereffect / physiology* Humans Models, Biological Motion Perception / physiology* Neural Inhibition Nonlinear Dynamics Optical Illusions / physiology Orientation Psychophysics Space Perception / physiology* Visual Pathways / physiology Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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