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Baby Lab

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Depth capture and transparency of regions bounded by illusory and chromatic contours.

Tested the claim of L. Spillmann and C. Redies (see record 1982-24956-001) that when a transparent textured pattern is held above the Ehrenstein figure, the subjective surfaces appear to lie not in the place of the figures but in the plane of the overlying texture. In Exp 1, this phenomenon was tested with 2 male observers and chromatic squares. It was found that the perceived depth of regions bounded by the chromatic contours was captured by overlying texture planes when the square was equiluminous with the background. This phenomenon was then tested in Exp 2 with the same Ss but with a variety of illusory contour stimuli. This phenomenon only occurred with figures involving fine line terminators. Results suggest that chromatic contours and the illusory contours induced by line terminators provide only weak binocular disparity signals and that these signals are easily overwhelmed by the disparity signals from the overlying luminance texture. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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