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  • Inhibition around visual stimuli

    Author(s)
    Chappell, M
    Griffith University Author(s)
    Chappell, Mark
    Year published
    2006
    Metadata
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    Abstract
    Kirschfeld and Kammer (1999), and independently Kanai, Sheth and Shimojo (2004), proposed that an inhibitory wake trails a moving visual stimulus, and a bow-wave like region of excitation precedes it. Using the perceived luminance of a small flash as a psychophysical probe, I demonstrate that indeed a region of significant inhibition extends behind a moving stimulus. However, in contradiction to these models, the region of inhibition also extends ahead of the moving stimulus, as well as to the side. In regions immediately around the moving stimulus, the average effect size (d) is estimated to be greater than three. ...
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    Kirschfeld and Kammer (1999), and independently Kanai, Sheth and Shimojo (2004), proposed that an inhibitory wake trails a moving visual stimulus, and a bow-wave like region of excitation precedes it. Using the perceived luminance of a small flash as a psychophysical probe, I demonstrate that indeed a region of significant inhibition extends behind a moving stimulus. However, in contradiction to these models, the region of inhibition also extends ahead of the moving stimulus, as well as to the side. In regions immediately around the moving stimulus, the average effect size (d) is estimated to be greater than three. Effects of the visual stimulus without its motion attribute, and masking effects of the moving stimulus, were controlled for.
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    Conference Title
    AUSTRALIAN JOURNAL OF PSYCHOLOGY
    Volume
    58
    Subject
    Cognitive and computational psychology
    Publication URI
    http://hdl.handle.net/10072/20101
    Collection
    • Conference outputs

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