Found A, Müller H J
Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK.
Perception. 2001;30(1):21-48. doi: 10.1068/p2656.
Six visual search experiments were carried out to investigate the processing of size information in early vision. The apparent size of display items was manipulated independently of their retinal size by placing items on a textured surface which altered the perceived distance in depth of the items. Overall, these experiments demonstrate that a target item differing from non-target items in terms of apparent size can be detected efficiently. However, the pattern of results indicates that, rather than deriving apparent-size information, target detection is guided by discontinuities in the 'retinal-size gradient' of items, in particular between items at the same 'depth'. Although the arrangement of items on the texture surface strongly influenced search, this was largely due to the retinal size of items and the retinal separation between items. The implications of these experiments for the nature of the pre-attentive representation of size are discussed.
进行了六项视觉搜索实验，以研究早期视觉中大小信息的处理过程。通过将显示项目放置在有纹理的表面上，改变项目在深度上的感知距离，从而独立于其视网膜大小来操纵显示项目的表观大小。总体而言，这些实验表明，在表观大小方面与非目标项目不同的目标项目能够被有效地检测到。然而，结果模式表明，目标检测不是由表观大小信息引导的，而是由项目的“视网膜大小梯度”中的不连续性引导的，特别是同一“深度”的项目之间的不连续性。尽管纹理表面上项目的排列对搜索有很大影响，但这主要是由于项目的视网膜大小和项目之间的视网膜间距。讨论了这些实验对大小的前注意表征性质的影响。
