Stuart Geoffrey W, Barsdell Wendy N, Day Ross H
School of Psychological Science, La Trobe University, Bundoora, VIC 3086, Australia; Defence Science and Technology Organisation, 506 Lorimer Street, Fishermans Bend, VIC 3207, Australia.
School of Psychology and Psychiatry, Monash University, Wellington Road, Clayton, VIC 3168, Australia.
Vision Res. 2014 Mar;96:25-32. doi: 10.1016/j.visres.2013.12.013. Epub 2013 Dec 31.
Visual attention is used to select part of the visual array for higher-level processing. Visual selection can be based on spatial location, but it has also been demonstrated that multiple locations can be selected simultaneously on the basis of a visual feature such as color. One task that has been used to demonstrate feature-based attention is the judgement of the symmetry of simple four-color displays. In a typical task, when symmetry is violated, four squares on either side of the display do not match. When four colors are involved, symmetry judgements are made more quickly than when only two of the four colors are involved. This indicates that symmetry judgements are made one color at a time. Previous studies have confounded lightness, hue, and saturation when defining the colors used in such displays. In three experiments, symmetry was defined by lightness alone, lightness plus hue, or by hue or saturation alone, with lightness levels randomised. The difference between judgements of two- and four-color asymmetry was maintained, showing that hue and saturation can provide the sole basis for feature-based attentional selection.
视觉注意力用于选择视觉阵列的一部分进行更高级别的处理。视觉选择可以基于空间位置,但也已证明,可以基于诸如颜色等视觉特征同时选择多个位置。用于证明基于特征的注意力的一项任务是对简单四色显示的对称性进行判断。在典型任务中,当对称性被破坏时,显示器两侧的四个方块不匹配。当涉及四种颜色时,对称性判断比只涉及四种颜色中的两种时更快。这表明对称性判断是一次对一种颜色进行的。以前的研究在定义此类显示中使用的颜色时混淆了明度、色调和饱和度。在三个实验中,对称性分别由单独的明度、明度加色调或单独的色调或饱和度来定义,明度水平是随机的。两种颜色和四种颜色不对称判断之间的差异依然存在,这表明色调和饱和度可以为基于特征的注意力选择提供唯一依据。