The glare effect is an illusion in which a region appears self-luminous when flanked by gradients that decrease in luminance with distance from the region (Zavagno, 1999 Perception 28 835 - 838). This region also appears brighter than a surface of the same luminance. We investigated, using the paradigm of afterimages, whether a low-level mechanism at the level of the retina or LGN could account for this apparent brighter sensation. We first replicated the result from the literature that brighter and longer-lasting physical stimuli generate longer-lasting afterimages. We then compared the glare-effect stimuli with their counterpart controls, and found that the glare-effect stimuli did not give rise to longer-lasting afterimages. This suggests that the apparent brighter sensation of the glare effect is not due to a retinal or LGN mechanism, but must have a cortical origin.

Lu, H., Zavagno, D., Liu, Z. (2006). The glare effect does not give rise to a longer lasting afterimage. PERCEPTION, 35(5), 701-707 [10.1068/p5484].

The glare effect does not give rise to a longer lasting afterimage

ZAVAGNO, DANIELE;
2006

Abstract

The glare effect is an illusion in which a region appears self-luminous when flanked by gradients that decrease in luminance with distance from the region (Zavagno, 1999 Perception 28 835 - 838). This region also appears brighter than a surface of the same luminance. We investigated, using the paradigm of afterimages, whether a low-level mechanism at the level of the retina or LGN could account for this apparent brighter sensation. We first replicated the result from the literature that brighter and longer-lasting physical stimuli generate longer-lasting afterimages. We then compared the glare-effect stimuli with their counterpart controls, and found that the glare-effect stimuli did not give rise to longer-lasting afterimages. This suggests that the apparent brighter sensation of the glare effect is not due to a retinal or LGN mechanism, but must have a cortical origin.
Articolo in rivista - Articolo scientifico
glare effect, luminosity, luminance gradients, afterimages
English
701
707
Lu, H., Zavagno, D., Liu, Z. (2006). The glare effect does not give rise to a longer lasting afterimage. PERCEPTION, 35(5), 701-707 [10.1068/p5484].
Lu, H; Zavagno, D; Liu, Z
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/333
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