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:: https://doi.org/10.1068/p6622
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    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 - Does NOT include content added after October 2018: Centre for Pedagogic Research and Innovation
    Departments - Does NOT include content added after October 2018: Faculty of Social Sciences and Humanities > Department of Psychology, Sociology and Politics
    Identification Number: https://doi.org/10.1068/p6622
    Page Range: 464-473
    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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