Ansorge Ulrich, Kiss Monika, Eimer Martin
University of Vienna, Vienna, Austria.
Psychon Bull Rev. 2009 Aug;16(4):648-53. doi: 10.3758/PBR.16.4.648.
We combined event-related brain potentials (ERPs) and behavioral measures to test whether subliminal visual stimuli can capture attention in a goal-dependent manner. Participants searched for visual targets defined by a specific color. Search displays served as metacontrast masks for preceding cue displays that contained one cue in the target color. Although this target-color cue was spatially uninformative, it produced behavioral spatial cuing effects and triggered an ERP correlate of attentional selection (i.e., the N2pc component). These results demonstrate that target-color cues captured attention, in spite of the fact that cue localization performance assessed in separate blocks was at chance level. We conclude that task-set contingent attentional capture is not restricted to supraliminal stimuli, but is also elicited by visual events that are not consciously perceived.
我们结合事件相关脑电位（ERP）和行为测量方法，以测试阈下视觉刺激是否能以目标依赖的方式吸引注意力。参与者搜索由特定颜色定义的视觉目标。搜索显示作为前序提示显示的元对比掩蔽物，前序提示显示中包含一个目标颜色的提示。尽管这个目标颜色提示在空间上没有提供信息，但它产生了行为空间提示效应，并触发了注意力选择的ERP相关成分（即N2pc成分）。这些结果表明，目标颜色提示吸引了注意力，尽管在单独的实验块中评估的提示定位表现处于随机水平。我们得出结论，任务集相关的注意力捕获不仅限于阈上刺激，也可由未被有意识感知的视觉事件引发。
