BIASES AND SENSITIVITIES IN GEOMETRICAL ILLUSIONS
BIASES AND SENSITIVITIES IN GEOMETRICAL ILLUSIONS
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DOI：
10.1016/0042-6989(90)90160-m
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发表时间：
1990-01-01
期刊：
影响因子：
1.8
通讯作者：
GLENNERSTER, A
中科院分区：
文献类型：
--
作者：
MORGAN, MJ;HOLE, GJ;GLENNERSTER, A
收集心理测量功能来测量某些经典错觉配置（如Mueller-Lyer）的偏差和敏感性。我们发现，敏感性（阈值或只是明显的差异）一般不受影响的错觉偏见的引入，这对理论的错觉的影响进行了讨论。对穆勒-莱尔图形的实验表明，这种效应取决于图形两端的错位，而不是尺寸恒定理论所要求的全局膨胀。描述了一种新的错觉，在这种错觉中，一个点的感知位置被移向周围一簇点的中心，尽管它可以通过颜色清楚地与簇中的其他成员区分开来。我们认为，错觉说明强大的视觉处理的限制：他们出现时，受试者被指示进行任务的视觉系统不适应。
Psychometric functions were collected to measure biases and sensitivities in certain classical illusory configurations, such as the Mueller-Lyer. We found that sensitivities (thresholds or just noticeable differences) were generally not affected by the introduction of illusory biases, and the implications of this for theories of the illusions are discussed. Experiments on the Mueller-Lyer figure showed that the effect depends upon mis-location of the ends of the figure, rather than upon a global expansion as demanded by the size-constancy theory. A new illusion is described in which the perceived position of a dot is displaced towards the center of a surrounding cluster of dots, even though it is clearly discriminable from other members of the cluster by their colour. We argue that illusions illustrate powerful constraints upon visual processing: they arise when subjects are instructed to carry out a task to which the visual system is not adapted.