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Interactions between working memory and selective attention

机译：工作记忆与选择性注意之间的相互作用

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Event-related potential (ERP) was used to examine the interactions between working memory and selective attention. We combined two unrelated tasks, one requiring working memory and the other selective attention, which were performed by some undergraduates. The ERP results revealed that both congruent and incongruent stimuli in the selective attention task evoked an N400 component, reaching the peak point at around 500 ms. The N400 evoked by incongruent stimuli was more negative than that of congruent, which indicated the difference of semantic N400. Furthermore, working memory load had a significant influence on the N400 evoked by selective attention task in parietal region. And working memory load showed difference in the ERPs of working memory retrieval in central and parietal regions. The ERPs of probe under high working memory load were more positive from 350 to 550 ms post-stimulus; however, stimulus type of selective attention had no influence on working memory retrieval. The present study shows that working memory does not play a major role in the selective attention, especially in ignoring distracter, but it influences the performance of the selective attention as the background. The congruency of target and distracter in the selective attention task does not influence the working memory retrieval.
机译：事件相关电位（ERP）用于检查工作记忆和选择性注意之间的相互作用。我们结合了两个不相关的任务，一个需要工作记忆，另一个需要选择性的注意，这些任务是由一些大学生完成的。 ERP的结果表明，选择性注意任务中的全同和非全同的刺激都引起了N400成分，在大约500 ms处达到峰值。不一致刺激引起的N400比一致刺激更为消极，这说明了语义N400的差异。此外，工作记忆负荷对顶区选择性注意任务诱发的N400有重要影响。工作记忆负荷显示中部和顶叶区域工作记忆检索的ERP有所不同。刺激后350到550毫秒，高工作记忆负载下探针的ERPs更为积极；但是，选择性注意的刺激类型对工作记忆的检索没有影响。本研究表明，工作记忆在选择性注意中，特别是在忽略注意力分散方面，并不起主要作用，但会影响选择性注意作为背景的表现。目标和干扰因素在选择性注意任务中的一致性不会影响工作记忆的检索。

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