| Response priming driven by local contrast, not subjective brightness. | |
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MedLine Citation:
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PMID: 20675800 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We demonstrate qualitative dissociations of brightness processing in visuomotor priming and conscious vision. Speeded keypress responses to the brighter of two luminance targets were performed in the presence of preceding dark and bright primes (clearly visible and flanking the targets) whose apparent brightness values were enhanced or attenuated by a visual illusion. Response times to the targets were greatly affected by consistent versus inconsistent arrangements of the primes, relative to the targets (response priming). Priming effects could systematically contradict subjective brightness matches, such that one prime could appear brighter than the other but could prime as if it were darker. Systematic variation of the illusion showed that response-priming effects depended only on local flanker-background contrast, not on the subjective appearance of the flankers. Our findings suggest that speeded motor responses, as opposed to conscious perceptual judgments, access an early phase of lightness and brightness processing prior to full lightness constancy. |
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Authors:
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Thomas Schmidt; Sandra Miksch; Lisa Bulganin; Florian Jäger; Felix Lossin; Joline Jochum; Peter Kohl |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Attention, perception & psychophysics Volume: 72 ISSN: 1943-393X ISO Abbreviation: Atten Percept Psychophys Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-02 Completed Date: 2010-12-28 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: 1556-68 Citation Subset: IM |
Affiliation:
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Faculty of Social Sciences, Psychology I, University of Kaiserslautern, Erwin-Schrödinger-Str. Geb. 57, D-67663 Kaiserslautern, Germany. thomas.schmidt@sowi.uni-kl.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Contrast Sensitivity* Cues* Depth Perception* Discrimination (Psychology) Female Humans Judgment Male Orientation* Pattern Recognition, Visual* Psychomotor Performance* Psychophysics Reaction Time Young Adult |
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