| Interactions between working memory and selective attention |
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| 作者姓名： | LIU ZhaoMin GUO ChunYan |
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| 作者单位： | Psychology Department, Capital Normal University, Beijing 100037, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant Nos. 30170322 and 30570603）, Chinese Ministry of Education （Grant Nos. 20040028001 and 06JZD0039）, the Beijing Key Laboratory, and PHR （IHLB） |
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| 摘 要： | Event-related potential (ERP) was used to examine the interactions between working memory and se- lective attention. We combined two unrelated tasks, one requiring working memory and the other se- lective 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 re- trieval. The present study shows that working memory does not play a major role in the selective at- tention, 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 influ- ence the working memory retrieval.
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| 关 键 词： | 工作存储器 选择注意 N400 事件联系位势 |
| 收稿时间： | 17 April 2007 |
| 修稿时间： | 2007-04-17 |
Interactions between working memory and selective attention |
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| LIU ZhaoMin GUO ChunYan.Interactions between working memory and selective attention[J].Chinese Science Bulletin,2007,52(20):2811-2819. |
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| Authors: | Liu ZhaoMin Guo ChunYan |
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| Institution: | (1) Psychology Department, Capital Normal University, Beijing, 100037, China |
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| Abstract: | Event-related potential (ERP) was used to examine the interactions between working memory and se- lective attention. We combined two unrelated tasks, one requiring working memory and the other se- lective 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 re- trieval. The present study shows that working memory does not play a major role in the selective at- tention, 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 influ- ence the working memory retrieval. |
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| Keywords: | working memory selective attention N400 |
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