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  The spoke brightness illusion originates at an early motion processing stage

Holcombe, A., Intriligator, J., & Tse, P. (2000). The spoke brightness illusion originates at an early motion processing stage. Perception and Psychophysics, 62(8), 1619-1624. doi:10.3758/BF03212159.

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Holcombe, AO, Author
Intriligator, J, Author
Tse, PU1, 2, Author              
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: When a bright white disk revolves around a fixation point on a gray background, observers perceive a "spoke": a dark gray region that connects the disk with the fixation point. Our first experiment suggests that motion across the retina is both necessary and sufficient for spokes: The illusion occurs when a disk moves across the retina even though it is perceived to be stationary, but the illusion does not occur when the disk appears to move while remaining stationary on the retina. A second experiment shows that the strength of the illusion decreases with decreasing luminance contrast until subjective equiluminance, where little or no spoke is perceived. These results suggest that spokes originate at an early, predominantly luminance-based stage of motion processing, before the visual system discounts retinal motion caused by smooth pursuit.

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 Dates: 2000-12
 Publication Status: Published in print
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 Identifiers: DOI: 10.3758/BF03212159
BibTex Citekey: 87
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Title: Perception and Psychophysics
Source Genre: Journal
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Publ. Info: Austin, Tex., etc. : Psychonomic Society, etc.
Pages: - Volume / Issue: 62 (8) Sequence Number: - Start / End Page: 1619 - 1624 Identifier: ISSN: 0031-5117
CoNE: https://pure.mpg.de/cone/journals/resource/954925432372