| 位置提示下视觉注意范围的调控机制 |
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| 引用本文： | 高文斌,魏景汉,彭小虎,罗跃嘉. 位置提示下视觉注意范围的调控机制[J]. 心理学报, 2004, 36(2): 139-144. DOI: |
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| 作者姓名： | 高文斌 魏景汉 彭小虎 罗跃嘉 |
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| 作者单位： | 中国科学院心理研究所，北京，100101 |
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| 基金项目： | 中国科学院“百人计划”项目，中国科学院重大交叉学科前沿项目 (KJCX1-0 7)，国家自然科学基金 (批准号 3 9970 2 5 7)，国家自然科学基金 (批准号3 0 3 0 0 113 )资助项目 |
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| 摘 要： | 研究视觉空间注意中不同注意范围引起脑内加工时程的动态变化。使用固定位置的、三种不同直径的线圈作为注意范围的位置性提示，祛除空间定位因素的影响，记录反应时和事件相关电位（ERP）数据。结果显示：在同等注意范围时，随着刺激位置远离视野中心，反应时延长，靶刺激诱发的P1、N1不受刺激位置的影响，而其前部N2的波幅明显受到刺激位置的影响；在靶刺激位置相同时，随着注意范围的扩大，反应时缩短，靶刺激诱发的P1、N1不受提示范围大小的影响，而其前部P2的波幅明显受到注意范围的影响。结果说明：①视觉注意范围信息加工与靶刺激诱发的P2成分相关；②视觉注意诱发的P1、N1成分，主要与注意方位相关，而与注意范围大小无关；③注意范围变化引起注意集中度的调节是在一定范围内进行的。
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| 关 键 词： | 视觉空间注意 位置提示 范围等级 调控机制 事件相关电位 |
| 收稿时间： | 2002-12-18 |
| 修稿时间： | 2002-12-18 |
THE ADJUST MECHANISM OF VISUAL SPATIAL ATTENTION SCALE ON P2 |
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| Gao Wenbin,Wei Jinghan,Peng Xiaohu,Luo Yuejia. THE ADJUST MECHANISM OF VISUAL SPATIAL ATTENTION SCALE ON P2[J]. Acta Psychologica Sinica, 2004, 36(2): 139-144. DOI: |
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| Authors: | Gao Wenbin Wei Jinghan Peng Xiaohu Luo Yuejia |
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| Affiliation: | The Key Laboratory of Mental Health, Institute of Psychology, CAS, Beijing 100101 |
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| Abstract: | This study investigated the dynamic brain mechanisms of the visual spatial attention scale under the different attention scale. The immobile cues of three different sizes were used to eliminate the effect of the spatial location factor. The simple reaction time (RT) and event-related potentials (ERPs) was recorded. The results were that the RT to the targets under the same cue prolonged when the targets far away from the center, the target evoked P1 and N1 components were not affected by the targets location, while the amplitudes of the anterosuperior N2 showed targets location effect. The RT to the targets in the same location shortened when the cue size enlarged, the target evoked P1 and N1 were not affected by the attention scale factor, while the amplitudes of the inferoposterior P2 enlarged when the attentive region size enlarged. The results suggested that ① targets evoked P2 component was related to the processing of visual scale attention, ② the P1 and N1 components under visual attention were not involved in the attention scale, but related to the attention location processing mainly, ③ the visual scale attention was adjusted in a certain extent. |
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| Keywords: | visual spatial attention location cue attention scale adjust mechanism event-related potentials (ERPs). |
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