| The whole moves less than the spin of its parts. | |
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MedLine Citation:
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PMID: 19429950 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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When individually moving elements in the visual scene are perceptually grouped together into a coherently moving object, they can appear to slow down. In the present article, we show that the perceived speed of a particular global-motion percept is not dictated completely by the speed of the local moving elements. We investigated a stimulus that leads to bistable percepts, in which local and global motion may be perceived in an alternating fashion. Four rotating dot pairs, when arranged into a square-like configuration, may be perceived either locally, as independently rotating dot pairs, or globally, as two large squares translating along overlapping circular trajectories. Using a modified version of this stimulus, we found that the perceptually grouped squares appeared to move more slowly than the locally perceived rotating dot pairs, suggesting that perceived motion magnitude is computed following a global analysis of form. Supplemental demos related to this article can be downloaded from app.psychonomic-journals.org/content/supplemental. |
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Authors:
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Peter J Kohler; Gideon P Caplovitz; Peter Ulric Tse |
Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Attention, perception & psychophysics Volume: 71 ISSN: 1943-3921 ISO Abbreviation: Atten Percept Psychophys Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-05-11 Completed Date: 2009-07-13 Revised Date: 2011-02-24 |
Medline Journal Info:
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Nlm Unique ID: 101495384 Medline TA: Atten Percept Psychophys Country: United States |
Other Details:
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Languages: eng Pagination: 675-9 Citation Subset: IM |
Affiliation:
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Dartmouth College, Hanover, New Hampshire, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Attention* Deceleration Discrimination (Psychology) Field Dependence-Independence* Humans Motion Perception* Optical Illusions* Orientation Pattern Recognition, Visual* Psychophysics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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