Lightness effects in Delboeuf and Ebbinghaus size-contrast illusions

DANEYKO, Olga, ZAVAGNO, Daniele and ZANUTTINI, Lucia (2011). Lightness effects in Delboeuf and Ebbinghaus size-contrast illusions. Perception, 40 (4), 464-473.

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Official URL: http://journals.sagepub.com/doi/abs/10.1068/p6622
Link to published version:: 10.1068/p6622

Abstract

We examined lightness effects observed in Delboeuf and Ebbinghaus size-contrast illusions. Results of four experiments are reported. Experiment 1 was conducted with Delboeuf- like stimuli and shows that the disk that appears bigger appears either lighter or darker than the disk that appears smaller, depending on the contrast polarity between disks and background. Experiment 2 shows that the direction of these lightness effects is not influenced by the lumi- nance of the size-contrast inducers. Experiment 3 shows that a similar lightness effect is also observed in modified Ebbinghaus size-contrast displays. Experiment 4 tested the presence of the size-contrast illusion in the stimuli used in experiments 2 and 3.

Item Type: Article
Research Institute, Centre or Group: Centre for Pedagogic Research and Innovation
Departments: Development and Society > Psychology, Sociology and Politics
Identification Number: 10.1068/p6622
Depositing User: Olga Daneyko
Date Deposited: 17 Jan 2018 13:52
Last Modified: 17 Jan 2018 13:52
URI: http://shura.shu.ac.uk/id/eprint/16745

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