Spehar Branka
School of Psychology, The University of New South Wales, Sydney, NSW 2052, Australia.
Vision Res. 2002 Feb;42(3):343-50. doi: 10.1016/s0042-6989(01)00287-5.
Perceptual closure is one of the principles by which the visual system groups disjointed contour segments belonging to a single object. Recently it has been reported that grouping based on perceptual closure operates only upon contour elements of a consistent contrast sign and is eliminated when closed contours contain contrast reversing segments [Elder, J. & Zucker, S. (1994) A measure of closure. Vision Research, 22, 3361-3369]. The present study re-examines the effect of contrast polarity reversals on perceptual closure with special emphasis on differentiating the effect of the presence of contrast polarity reversals from the effect of their placement along the bounding contour. Results show that perceptual closure exhibits a strong dependence on the distribution of contrast polarity reversals: closed configurations containing intra-figural contrast reversals can be processed rapidly when contrast sign does not change at the corners of two-dimensional shapes.
知觉闭合是视觉系统将属于单个物体的不连续轮廓段进行分组的原则之一。最近有报道称，基于知觉闭合的分组仅对具有一致对比度标志的轮廓元素起作用，当闭合轮廓包含对比度反转段时，这种分组就会消失[埃尔德，J. & 朱克，S.（1994年）闭合度的一种度量。《视觉研究》，22，3361 - 3369]。本研究重新审视了对比度极性反转对知觉闭合的影响，特别强调区分对比度极性反转的存在所产生的影响与其沿边界轮廓的放置所产生的影响。结果表明，知觉闭合对对比度极性反转的分布表现出强烈的依赖性：当二维形状的角点处对比度标志不变时，包含图形内部对比度反转的闭合构型能够被快速处理。
