Plug C, Ross H E
Department of Psychology, University of South Africa, Pretoria.
Perception. 1994;23(3):321-33. doi: 10.1068/p230321.
It is argued that the failure to explain the celestial illusion results from conceptual confusion about perceived size and from disregard of the observational evidence relating to the natural moon illusion. The evidence shows that the illusion consists of a perceived angular size enlargement of horizon objects, by a factor of about 1.5-2.0 in diameter in comparison with elevated objects. Most measurements of the illusion have been made in terms of angular size, although in some proposed explanations an illusion of linear size is assumed. The magnitude of the illusion varies, particularly with the detail of the horizon scene. The illusion can be explained as the sum of several factors that affect perceived angular size: size contrast, vergence commands and eye or head position, aerial perspective, and colour. The relative contributions of these factors are assessed.
有人认为，无法解释天体错觉是由于对感知大小的概念混淆以及忽视了与自然月亮错觉相关的观测证据。证据表明，这种错觉包括地平线物体的感知角大小增大，与高空物体相比，直径增大了约1.5至2.0倍。尽管在一些提出的解释中假定存在线性大小错觉，但大多数错觉测量都是根据角大小进行的。错觉的程度各不相同，尤其取决于地平线场景的细节。这种错觉可以解释为影响感知角大小的几个因素的总和：大小对比、辐辏指令以及眼睛或头部位置、空气透视和颜色。评估了这些因素的相对贡献。
