Perceptual organization overcomes the effects of local surround in determining simultaneous lightness contrast
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Published on: January 23, 2017
Tiziano Agostini1, Alessandra Galmonte
1Department of Psychology, University of Trieste, Italy. agostini@univ.trieste.it
Abstract:
Lightness induction can occur on the basis of the immediate surround of a region (local interactions) and also on the basis of global factors of perceptual organization. The experiments reported in this article used novel displays that made it possible to differentiate the contributions of these two kinds offactors. The experiments demonstrated, for the first time, that when higher-level factors act contemporaneously with lower-level factors, the contrast effect induced by the global-organization principle of perceptual belongingness overcomes the effect due to retinal lateral inhibition.
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