心理学
刺激(心理学)
电生理学
N2pc
脑电图
视觉搜索
同种类的
神经科学
事件相关电位
沟通
听力学
认知心理学
视觉注意
认知
物理
热力学
医学
作者
Steven J. Luck,Steven A. Hillyard
标识
DOI:10.1111/j.1469-8986.1994.tb02218.x
摘要
Abstract Event‐related brain potentials (ERPs) were recorded from normal young adults during visual search tasks in which the stimulus arrays contained either eight identical items (homogeneous arrays) or seven identical items and one deviant item (pop‐out arrays). Four experiments were conducted in which different classes of stimulus arrays were designated targets and the remaining stimulus arrays were designated nontargets. In Experiments 1 and 2, both target and nontarget pop‐out stimuli elicited an enhanced anterior N2 wave and a contralaterally larger posterior P1 wave, but Experiments 3 and 4 demonstrated that these components do not reflect fully automatic pop‐out detection processes. In all four experiments, target pop‐outs elicited enlarged anterior P2, posterior N2, occipital P3, and parietal P3 waves. The target‐elicited posterior N2 wave contained a contralateral subcomponent (N2pc) that exhibited a focus over occipital cortex in maps of current source density. The overall pattern of results was consistent with guided search models in which preattentive stimulus information is used to guide attention to task‐relevant stimuli.
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