心理旋转；_事件相关电位；_知觉质量；_潜伏期_

知觉质量对汉字心理旋转事件相关电位P300的影响

http://www.100md.com 《第四军医大学学报》 2007年第7期

心理旋转；,事件相关电位；,知觉质量；,潜伏期,,心理旋转；事件相关电位；知觉质量；潜伏期,0引言,1材料和方法,2结果,3讨论,【参考文献】

     Influence of perceptional quality of stimulus on eventrelated potential P300 during mental rotation

    LIU LianHong1, WANG ZhiBin, LIU XuFeng, MIAO DanMin, WANG Wei

    1Department of Psychology, School of Aerospace Medicine, 2Cadre Sanitarium, Fourth Military Medical University, Xian 710033, China

    【Abstract】 AIM： To observe the effects of visual noise on the mental rotation. METHODS： The reaction time and eventrelated potentials (ERP) were recorded when 8 healthy male college students were tested by mental rotation task. Stimuli were white words on a black background without visual noise and white words on a gray background with visual noise. RESULTS： With the increase of the rotation angle from 0° to 180° the average amplitude of P300 in Pz changed from (13.3±2.6) μV to (10.8±1.9) μV. The average latency of P300 changed from (504±65) ms to (601±53) ms; there was significant difference in the latency (P<0.05). The average amplitude of P300 in Cz changed from (9.8±2.3) μV to (9.0±2.8) μV. The average latency of P300 changed from (561±52) ms to (614±56) ms; there was significant difference in the average latency (P<0.05). CONCLUSION： With the increase of rotation angle ......

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