Thomas J P, Olzak L A
Department of Psychology, University of California, Los Angeles 90024.
Vision Res. 1990;30(11):1865-75. doi: 10.1016/0042-6989(90)90164-g.
We investigated the extent to which discrimination performance improves when more than a single cue distinguishes two patterns. When two simple gratings differ slightly in spatial frequency, orientation, and/or contrast, the performance of most observers is better in multiple-cue conditions than in single-cue conditions and by an amount indicating Euclidean summation of information. These results are shown to be consistent with discrimination models that integrate information over different, spatially selective pathways. However, little summation is found when the task requires integration of cues across widely separated spatial frequency bands. This result implies that information is integrated only over pathways tuned to a common region of the spatial frequency domain.
我们研究了当不止一个线索区分两种模式时，辨别性能提高的程度。当两个简单光栅在空间频率、方向和/或对比度上略有不同时，大多数观察者在多线索条件下的表现优于单线索条件，并且其程度表明信息的欧几里得总和。这些结果表明与在不同的、空间选择性的通路中整合信息的辨别模型是一致的。然而，当任务需要跨广泛分离的空间频率带整合线索时，几乎没有发现总和。这一结果意味着信息仅在调谐到空间频率域的共同区域的通路中整合。
