The configural shape illusion
The configural shape illusion
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DOI：
10.1167/14.8.23
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发表时间：
2014-01-01
影响因子：
1.8
通讯作者：
Palmer, Stephen E.
中科院分区：
文献类型：
--
作者：
Schloss, Karen B.;Fortenbaugh, Francesca C.;Palmer, Stephen E.
描述了一种新的错觉，称为视觉形状错觉（CSI），其中物体（“目标”）的表观形状由于相邻形状（“诱导物”）的存在而系统地扭曲，该相邻形状与目标不同，但在感知上与目标分组。靶在与包括靶和诱导物两者的较大构造的延伸一致的方向上选择性地伸长。实验1和2表明，CSI幅度系统地变化与已知的因素，包括接近，良好的连续性，位置对齐，亮度相似性，色调相似性，和共同的命运之间的分组强度的影响。实验3至实验5考察了诱导物相对大小和目标物相对大小对错觉大小的影响。我们认为，CSI是由边缘同化调制的目标和诱导物之间的相似性所产生的人口编码的边缘位置。这种同化解释与先前对线性范围的一维错觉的解释非常吻合（例如，Muller-Lyer错觉和Baldwin错觉），这些错觉被扩展到解释目前的二维形状错觉。
A new illusion, called the configural shape illusion (CSI), is described in which the apparent shape of an object (the "target'') is systematically distorted by the presence of an adjacent shape (the "inducer'') that is distinct from, but perceptually grouped with, the target. The target is selectively elongated in a direction consistent with the extension of the larger configuration that includes both target and inducer. Experiments 1 and 2 show that the CSI magnitude varies systematically with factors known to influence grouping strength between configural elements, including proximity, good continuation, positional alignment, lightness similarity, hue similarity, and common fate. Experiments 3 through 5 examine the influence of relative inducer size and target size on illusion magnitude. We suggest that the CSI is caused by edge assimilation modulated by similarity between the target and inducer arising from population coding of edge positions. This assimilation account fits well with previous explanations of one-dimensional illusions of linear extent (e.g., the Muller-Lyer and Baldwin illusions), which are extended to account for the present two-dimensional illusion of shape.