Coren S, Porac C
Perception. 1983;12(1):49-54. doi: 10.1068/p120049.
A configuration is presented in which both the overestimated and the underestimated portions of the Müller-Lyer illusion are embedded. In free viewing no distortion of length occurs; however, overestimation or underestimation illusions can be produced by simple manipulation of the attentional set, thus demonstrating one cognitive component in the formation of the Müller-Lyer distortion.
呈现了一种配置，其中嵌入了缪勒-莱尔错觉的高估部分和低估部分。在自由观察中，长度不会发生扭曲；然而，通过简单地操纵注意力集，可以产生高估或低估错觉，从而证明了缪勒-莱尔扭曲形成中的一个认知成分。
