Department of Cognitive Psychology, Vrije Universiteit Amsterdam Amsterdam, Netherlands.
Front Psychol. 2010 Nov 17;1:189. doi: 10.3389/fpsyg.2010.00189. eCollection 2010.
Salient objects in the visual field attract our attention. Recent work in the orientation domain has shown that the effects of the relative salience of two singleton elements on covert visual attention disappear over time. The present study aims to investigate how salience derived from color and luminance differences affects covert selection. In two experiments, observers indicated the location of a probe which was presented at different stimulus-onset-asynchronies after the presentation of a singleton display containing a homogenous array of oriented lines and two distinct color singletons (Experiment 1) or luminance singletons (Experiment 2). The results show that relative singleton salience from luminance and color differences, just as from orientation differences, affects covert visual attention in a brief time span after stimulus onset. The mere presence of an object, however, can affect covert attention for a longer time span regardless of salience.
视野中的显著物体吸引我们的注意力。最近在定向领域的研究表明，两个独立元素的相对显著程度对隐蔽视觉注意的影响会随着时间的推移而消失。本研究旨在探讨颜色和亮度差异产生的显著性如何影响隐蔽选择。在两个实验中，观察者在呈现包含同质排列的定向线和两个不同颜色的独立元素（实验 1）或亮度独立元素（实验 2）的独立元素显示后，在不同的刺激呈现时间间隔后指示探针的位置。结果表明，来自亮度和颜色差异的相对独立元素显著性，就像来自方向差异的显著性一样，在刺激呈现后很短的时间内影响隐蔽视觉注意力。然而，仅仅一个物体的存在就可以在不管显著性如何的情况下，长时间影响隐蔽注意力。
