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Scintillating lustre and brightness induced by radial lines

Pinna, Baingio and Spillmann, Lothar and Ehrenstein, Walter H. (2002) Scintillating lustre and brightness induced by radial lines. Perception, Vol. 31 (1), p. 5-16. eISSN 1468-4233. Article.

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DOI: 10.1068/p3281


Gray disks inserted into the central gaps of an Ehrenstein pattern appear to lighten up and scintillate with each movement of the eye or stimulus pattern. We call this phenomenon scintillating lustre. Both phenomena -- illusory brightness and scintillating lustre -- depend on the presence of the radial inducing lines converging onto the gaps. Without the radii the gray disks appear matte. Using parametric stimulus variation, we show that the strength of scintillating lustre covaries with line-induced brightness enhancement when the length, width, number, and contrast of the radial lines, as well as the size of the gaps in the Ehrenstein figure, are varied. Following the proposal by Anstis (2000, Vision Research 40 2551 - 2556), we suggest that lustre results from a competition between the ON and OFF visual pathways. Whereas Helmholtz's binocular gloss is elicited by stereoscopically fused incremental and decremental stimuli, the present study demonstrates that lustre can also arise from the interaction between line-induced brightness (illusory increment) and a dark gray disk (physical decrement).

Item Type:Article
ID Code:2630
Uncontrolled Keywords:Scintillating lustre, illusory brightness, radial inducing lines
Subjects:Area 11 - Scienze storiche, filosofiche, pedagogiche e psicologiche > M-PSI/01 Psicologia generale
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze dei linguaggi
Deposited On:18 Aug 2009 10:08

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