|
|
视觉空间注意的早期ERP等级效应
Early Scale Effects of the Visual Spatial Attention
查看参考文献7篇
|
文摘
|
目的 采用“提示-目标”的视觉实验范式，以文字提示不同等级的搜索范围，通过事件相关电位（ERP）技术研究视觉注意脑机制。方法 16名在校大学生作为有偿被试，刺激序列为背景-提示-靶刺激。背景由3个同心白色圆形线条组成。刺激材料是随机选取的大写英文字母，组成大、中、小3个同心圆圈。提示为汉字“大”“中”和“小”，指定“T”为靶刺激。大提示时，目标“T”可能会出现在大中小3个圈内；中提示时，“T”出现在中小两个圈内；当小提示时，目标只出现在小圈内。结果 随着提示等级的减小，反应时加快，而早期ERP成分P_1与N_1波幅增大，偶极子定位发现P_1位于枕部。结论 不同的注意范围与早期P_1、N_1成分相关，而且提供了支持聚光灯理论的电生理学证据，阐明了聚光灯效应发生在信息加工的早期阶段。 |
|
其他语种文摘
|
Objective To investigate the visual attention mechanisms of brain, the "cue-target" experimental paradigm was adopted, and the attended range was cued by different Chinese characters. Method Sixteen healthy young participants (8 male and 8 female, 19-24 years old with an average of 21) served as the sub-jects. The stimulus sequence was "background-cue-target". The background was comprised of three homocen-tric white circles. Cue was the Chinese character "large", "median" and "small". There were 8 capital Eng-lish letters in each circle, which formed three homocentric circles. "T" was designed as the target stimulus. When the cue was large, the target "T" appeared within the three circles. When the cue was medium, "T" appeared within the medium and small circles. When the cue was small, the T maybe appeared only within the small circle. Result The reaction time became short with the decrease of the cue scale, while P, and N, components amplitudes increased. Conclusion These results not only provided the electrophysiological evi-dence for the spot light theory, but also indicated that the spot-light effect happened at the early period of the information processing. |
|
来源
|
航天医学与医学工程
,2003,16(6):452-454 【扩展库】
|
|
关键词
|
视觉注意
;
提示等级
;
聚光灯效应
;
事件相关电位
|
|
地址
|
中科院心理所, 心理健康重点实验室, 北京, 100101
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1002-0837 |
|
学科
|
特种医学 |
|
文献收藏号
|
CSCD:1246382
|
参考文献 共
7
共1页
|
|
1.
Posner M I. Orienting of attention[J].
Q J Exp Psychol,1980,32:3-25
|
CSCD被引
89
次
|
|
|
|
|
2.
Luo Y J. Dynamics of the spatial scale of visual attention revealed by brain event-related potentials[J].
Cogn Brain Res,2001,12(3):371-381
|
CSCD被引
18
次
|
|
|
|
|
3.
Gao W B. Brain Dynamic mechanisms on the visual attention scale with Chinese characters cues[J].
Chin Sci Bull(in Eng),2002,47(19):1644-1649
|
CSCD被引
3
次
|
|
|
|
|
4.
Hillyard S A. Event-related brain potentials in the study of visual selective attention[J].
Proc Natl Acad Sci USA,1998,95(3):781-787
|
CSCD被引
47
次
|
|
|
|
|
5.
Hillyard S A. Analysis with ERP recording[M].
Cognitive Electrophysiology: Event-related brain potentials in basic and clinical research,1994:1-25
|
CSCD被引
3
次
|
|
|
|
|
6.
Martinez A. timing and localization of stimulus selection processes in striate and extrastriate visual areas[J].
Vision Research,2001,41(9):1437-1457
|
CSCD被引
8
次
|
|
|
|
|
7.
魏景汉. 认知事件相关脑电位教程[M].
认知事件相关脑电位教程,2002:301
|
CSCD被引
4
次
|
|
|
|
|
|
了解气象卫星更多信息，请访问