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首页> 外文期刊>Journal of psychophysiology >Unattended Distractor-Induced Priming in a Visual Selective Attention Task N400 Effects in the Absence of RT Effects
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Unattended Distractor-Induced Priming in a Visual Selective Attention Task N400 Effects in the Absence of RT Effects

机译：在无RT效果的情况下，在视觉选择性注意任务中无人值守的干扰物引发的启动N400效果

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摘要

Event-related potentials (ERPs) were recorded from 24 subjects in a visual selective-attention task in which two words were each presented both in a prime display and in a probe display with the target word defined by color. Subjects' task for the prime display was a physical one (target word presented in upper or lower case letters), while the probe display task was a lexical decision. In addition to a neutral condition, four conditions were realized by varying the target probe: The target probe word was (1) a repetition of the target prime (attended repetition), (2) a semantically associated word to the target prime (attended semantic), (3) a repetition of the distractor prime (unattended repetition), or (4) a word semantically associated to the distractor prime (unattended semantic). An attended semantic and an attended repetition priming effect was observed by means of both RT and N400. The N400 differentiated between these two attended priming conditions while RT did not. No unattended priming effects were found with behavioral data. The N400 amplitude modulation, however, was also present for unattended priming but was attenuated compared to the attended condition. The data suggest (1) that automatic processes are sufficient to evoke an N400 effect, and (2) that the N400 effect is a more sensitive indicator for priming effects than response times.
机译：在视觉选择性注意任务中记录了24名受试者的事件相关电位（ERP），其中两个单词分别在主要显示和探针显示中呈现，目标单词由颜色定义。对象的主要显示任务是物理任务（目标单词以大写或小写字母表示），而探测显示任务则是词汇决定。除了中立条件外，还通过改变目标探针来实现四个条件：目标探针词是（1）目标素数的重复（人为重复），（2）与目标素数的语义相关联的单词（人为语义） ），（3）干扰素数的重复（无人值守重复），或（4）与干扰素素的语义相关的单词（无人值守语义）。通过RT和N400都可以观察到伴随语义和伴随重复启动效果。 N400区分了这两种有人准备好的启动条件，而RT没有。行为数据未发现无人注意的启动效应。但是，N400调幅也存在于无人值守的启动中，但与照看条件相比衰减了。数据表明（1）自动过程足以引起N400效应，并且（2）N400效应比起响应时间更能反映启动效应。

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