Global Factors in the Hermann Grid Illusion
Global Factors in the Hermann Grid Illusion
复制标题
赫尔曼网格错觉中的全球因素
作者：
J. Wolfe
大多数对赫尔曼网格错觉的解释本质上都是局部的。例如，在鲍姆加特纳的模型中，效应是由具有同心开-关或关-开感受野的细胞的反应产生的。此类模型预测，无论是单独观看还是与网格中的其他交叉点一起观看，给定交叉点处的错觉幅度都应该相同。报告了两个实验。第一个证明了错觉的大小随着交叉点的数量而增长。第二个结果表明，当交叉点排列在有序的网格中时，可以看到这种增长，而当它们不规则地放置时，则不会。这些结果表明，一个纯粹的本地模型赫尔曼网格错觉是不是一个完整的解释。必须涉及全球因素。
Most explanations of the Hermann grid illusion are local in nature. For example, in Baumgartner's model the effect is generated by the response of cells having concentric on—off or off—on receptive fields. Such models predict that the magnitude of the illusion at a given intersection should be the same whether that intersection is viewed in isolation or in conjunction with other intersections in a grid. Two experiments are reported. The first demonstrates that illusion magnitude grows with the number of intersections. The second shows that this growth is seen when the intersections are arranged in an orderly grid but not when they are placed irregularly. These results suggest that a purely local model for the Hermann grid illusion is not a complete explanation. Global factors must be involved.