Effects of spatial separation between stimuli in whole report from brief visual displays

Søren Kyllingsbæk, Christian Valla, Jan Vanrie, Claus Mogens Bundesen

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    10 Citationer (Scopus)

    Abstract

    Direct measurements of effects of spatial separation between stimuli in whole report
    from brief visual displays are reported. The stimuli were presented on the periphery of
    an imaginary circle centered on fixation. In Experiment 1, each display showed 2
    capital letters (letter height = 1.3°, width = 0.9°, eccentricity = 5.5°). The proportion
    of correctly reported letters was a strictly increasing, decelerating function of the
    spatial separation between the letters for center-to-center separations ranging from
    less than 2° to more than 10° of visual angle. Experiment 2 yielded similar results
    with triples of letters. Experiment 3 showed that accuracy increased with spatial
    separation for report of 2 short words, and Experiment 4 showed the same result for
    words presented upside-down. The results are explained by a model of lateral masking
    (crowding) based on competitive interactions within receptive fields of cortical
    neurons.
    OriginalsprogEngelsk
    TidsskriftPerception and Psychophysics
    Vol/bind69
    Udgave nummer6
    Sider (fra-til)1040-1050
    Antal sider11
    ISSN0031-5117
    StatusUdgivet - 2007

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