Spatial filtering and the Zollner-Judd geometrical illusion: Further studies
Spatial filtering and the Zollner-Judd geometrical illusion: Further studies
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DOI：
10.1068/p241397
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发表时间：
1995-01-01
期刊：
影响因子：
1.7
通讯作者：
Maskell, SJ
中科院分区：
文献类型：
--
作者：
Earle, DC;Maskell, SJ
在一个几何图形中，每个长的垂直线都被一系列短的斜线交叉，这样就获得了一种错觉效果，使得长线的方向被认为是不垂直的，并且偏离了斜线的方向（Zollner错觉），此外，交叉（倾斜）线之间的垂直间隔被感知为小于如果交叉线是水平的（贾德错觉）。以前已经表明，这两种效应是密切相关的，并提出了一个单一的过程帐户中，这两种效应的计算模型，涉及带通空间滤波的数字通过差分高斯（DOG）滤波器的解释。两个论点提出反对后者的帐户。首先，在相反对比极性图中，例如，在中灰色背景上具有白色垂直线和黑色交叉线，DOG滤波器输出中的峰值预测Zollner-Judd效应的反转。结果表明，这种预测是不成立的，并获得正常的效果。第二，它表明，正常的Zollner-Judd效应得到的长垂直线的情况下，并在异常轮廓的存在。后一种效应也与带通滤波模型相矛盾。这些研究结果进行了讨论的Zollner-Judd效应的双过程帐户。
In a geometrical figure in which long vertical lines are each crossed by a series of short oblique lines, an illusory effect is obtained such that the orientations of the long lines are perceived as nonvertical and shifted away from the orientation of the oblique fines (the Zollner illusion), In addition, the vertical separation between the crossing (oblique) lines is perceived as less than that if the crossing lines are horizontal (the Judd illusion). It has previously been shown that these two effects are closely related, and a single-process account has been proposed in which both effects are explained by a computational model involving band-pass spatial filtering of the figure by means of difference-of-Gaussians (DOG) filters. Two arguments are presented against the latter account. First, in an opposite-contrast-polarity figure with, for example, white vertical lines and black crossing lines on a mid-grey background, the peaks in the DOG filter output are such as to predict the reversal of the Zollner-Judd effects. It is shown by demonstration that this prediction is disconfirmed, and that the normal effects are obtained. Second, it is shown that the normal Zollner-Judd effects are obtained in the absence of the long vertical lines, and in the presence of anomalous contours. The latter effects are also in contradiction to the band-pass-filtering model. These findings are discussed in relation to a dual-process account of the Zollner-Judd effects.