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The spatiotemporal properties of the Craik–O’Brien–Cornsweet effect are consistent with ‘filling-in

The Craik–O'Brien–Cornsweet effect (COCE) is an illusion in which luminance discontinuities give rise to illusory brightness. One hypothesised mechanism for the induction of illusory brightness is that the cortex constructs a brightness percept from edge information by a lateral ‘filling-in’ pr...

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Bibliographic Details
Published in:Vision research (Oxford) 1998-06, Vol.38 (13), p.2037-2046
Main Authors: Davey, M.P., Maddess, T., Srinivasan, M.V.
Format: Article
Language:English
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Summary:The Craik–O'Brien–Cornsweet effect (COCE) is an illusion in which luminance discontinuities give rise to illusory brightness. One hypothesised mechanism for the induction of illusory brightness is that the cortex constructs a brightness percept from edge information by a lateral ‘filling-in’ process. A requirement for the filling-in hypothesis is that ability of the illusion to form would be limited by the speed of propagation of the filling-in. The results presented here from three methods indicate that in the case of COCE gratings brightness information propagates at a fixed speed across the central visual field of about 19°/s, and across visual areas V1 or V2 at 155 or 205 (±20) mm/s, respectively.
ISSN:0042-6989
1878-5646
DOI:10.1016/S0042-6989(97)00329-5