Center for Mind and Brain, University of California-Davis, Davis, California 95616, USA.
Psychophysiology. 2012 Aug;49(8):1101-8. doi: 10.1111/j.1469-8986.2012.01385.x. Epub 2012 Jul 9.
A well-replicated finding is that visual stimuli presented at an attended location are afforded a processing benefit in the form of speeded reaction times and increased accuracy (Mangun, ; Posner,). This effect has been described using a spotlight metaphor, in which all stimuli within the focus of spatial attention receive facilitated processing, irrespective of other stimulus parameters. However, the spotlight metaphor has been brought into question by a series of combined expectancy studies that demonstrated that the behavioral benefits of spatial attention are contingent on secondary feature-based expectancies (Kingstone,). The present work used an event-related potential (ERP) approach to reveal that the early neural signature of the spotlight of spatial attention is not sensitive to the validity of secondary feature-based expectancies.
一个经过充分验证的发现是，在注意力集中的位置呈现的视觉刺激会带来处理上的优势，表现为反应时间加快和准确性提高（芒根，；波斯纳，）。这种效应可以用聚光灯隐喻来描述，在这种隐喻中，空间注意力焦点内的所有刺激都得到了促进处理，而不考虑其他刺激参数。然而，聚光灯隐喻受到了一系列结合预期研究的质疑，这些研究表明，空间注意的行为优势取决于次要基于特征的预期（金斯顿，）。本研究采用事件相关电位（ERP）方法表明，空间注意聚光灯的早期神经特征对次要基于特征的预期的有效性不敏感。
