| Mystery of the anti-McCollough effect. | |
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MedLine Citation:
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PMID: 21691903 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The McCollough Effect (ME) is a complex perceptual aftereffect that remains of interest half a century after its discovery. It is argued that a recently reported variant, dubbed the anti-McCollough effect, is not the reverse of the ME, with aftereffect colors in the same direction as the inducing stimuli. A red-horizontal stimulus leads to a reddish aftereffect not because of red-horizontal parings, but despite them. The anti-ME is a weak standard-direction ME produced by complementary afterimage colors (afterimage green with horizontal), rather than by environmental colors, first shown decades ago. It is not a new type of contingent aftereffect. The red-horizontal pair does not interfere with the afterimage green-horizontal pair it produces because a single color-orientation pairing provides more ambiguous input than does the standard two orientation-color pairings (red-horizontal, green-vertical) of the ME. It is also argued that not even one orientation-contingent color aftereffect is convincingly shown in the "anti"-ME, let alone, as has previously been suggested, two simultaneous orientation-contingent color aftereffects in opposite directions at different levels of the visual system, in which the higher-level effect suppresses the downstream effect from reaching consciousness. The "anti"-ME can be explained by existing theories of contingent aftereffects, including perceptual-learning theory. |
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Authors:
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Felice L Bedford |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-6-21 |
Journal Detail:
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Title: Attention, perception & psychophysics Volume: - ISSN: 1943-393X ISO Abbreviation: - Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-6-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101495384 Medline TA: Atten Percept Psychophys Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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University of Arizona, Tucson, Arizona, 85721, USA, bedford@u.arizona.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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