WHICH DETERMINES FIGURAL AFTER-EFFECT, RETINAL SIZE OR APPARENT SIZE?

概要

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After-effects of I-circles of various sizes on a T-circle of a constant size (1 degree) were measured by means of the method of transposition (Oyama, 1959) for 5 <I>S</I>s under four distance conditions of I- and T-circles, Near-Near, Far-Near, Far-Far, and Near-Far. A white card with a fixation mark was presented 1 sec at the same distance as the T-figure between the I-and T-periods to make S's eyes to ready to fixate the T-figure. Constancy measurements made in the same experimental situation indicated strong tendencies to size constancy. The results of the four conditions were very similar to one another, when they were represented as a function of the retinal-size ratio of the I-to T-circle, but they were quite different when they were represented as a function of the apparent-size ratio. It was concluded that the retinal size determines figural aftereffect.
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