固定位置区域提示下视觉注意范围等级的ERP研究
ERP study on scale of visual spatial attention with fixed cues
查看参考文献13篇
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文摘
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研究视觉空间注意中注意范围的脑内时程的动态变化。被视为14名青年人，使用固定位置的、3种不同直径的线圈作为注意范围的区域性提示，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：提示范围由小到中等时，反应时延长，而由中等到大范围时，反应时缩短；提示物和靶刺激诱发ERP的早成分（N1、P1）不受提示范围大小的调节，而其P2、N2的波幅与潜伏期均明显受到提示范围大小的影响。这些结果说明：①视觉注意诱发的P1、N1成分，主要与空间定位信息的加工相关；②提示物诱发的P2、N2成分与注意范围相关；③在视觉信息加工过程中，空间位置的信息要早于其它信息被加工，支持视觉信息串行加工观点。 |
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其他语种文摘
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This study investigated into the simple reaction time (RT) and event-related potentials (ERPs) correlates of the scale of visual spatial attention. Fourteen participants performed a search task in which the search array was preceded by fixed cues of different sizes. The cue was a black circle varied in three different sizes randomly. The focuses of the circles were always at the center of the screen, avoiding the influence of spatial location. The RT with medium cue was longer than with small cue, and was shorter than with large cue. There were no amplitude modulations of both cue-evoked and search array-evoked PI and Nl components with cue size. However, both amplitude and latency of P2 and N2 were signif-icantly affected by cue size. The results showed: ?The PI and Nl components under visual attention were related to the spatial location processes mainly. (g)Cue-evoked P2, N2 components were related to the size of attention range. ?The processes of spatial location information were earlier than other information in visual attention, which supported the theory that spatial selection is a prerequisite for correct processes of visual objects information. |
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来源
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心理学报
,2002,34(5):443-448 【核心库】
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关键词
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视觉空间注意
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区域提示
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范围等级
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事件相关电位
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地址
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中国科学院心理研究所, 北京, 100101
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语种
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中文 |
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ISSN
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0439-755X |
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学科
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社会科学总论 |
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基金
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中国科学院“百人计划”项目
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中国科学院知识创新工程重大项目
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国家自然科学基金
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文献收藏号
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CSCD:1161625
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