The study examined some effects of stimulus size and distance on the persistence of one type of illusory motion, viz., the spiral aftereffect (SAE). Duration of SAE was investigated with stimuli of 2, 4, 8, 12, and 16 inches in diameter. The distance between the observers and the rotating spirals was varied to produce visual angles between 1 deg. 12 min. and 18 deg. 56 min. of arc. Data indicate that the duration of illusory motion reaches peak values between approximately 2 deg. -4 deg. of visual angle. (Author)


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    Title :

    The Spiral Aftereffect: Influence of Stimulus Size and Viewing Distance on the Duration of Illusory Motion


    Contributors:

    Publication date :

    1968


    Size :

    9 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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