交叉模态
刺激(心理学)
听力学
心理学
脑电图
事件相关电位
感知
晚期阳性成分
认知心理学
视觉感受
神经科学
医学
作者
Michael Falkenstein,J. Hohnsbein,J. Hoormann,L. Blanke
出处
期刊:Electroencephalography and Clinical Neurophysiology
[Elsevier]
日期:1991-06-01
卷期号:78 (6): 447-455
被引量:1499
标识
DOI:10.1016/0013-4694(91)90062-9
摘要
Reaction times and event-related potentials in correct and incorrect trials were studied in a bimanual choice reaction task. In a focused attention (FA) condition, the stimulus modality was constant (visual or auditory); in a divided attention (DA) condition, the modality was varied at random from trial to trial. Stimulus- and response-triggered averages were computed from the midline EEG leads. In error trials, the ERP amplitude was reduced in the P300 range (300–500 msec) and enhanced in the slow wave range (500–700 msec) compared to correct reaction trials. Difference plots between the ERPs (incorrect minus correct reaction trials) revealed a large fronto-central negativity (“NE”) and a parieto-occipital “slow wave”. These components appeared larger in the response-triggered averages. We believe that they reflect two different stages of error processing. After auditory stimuli the NE peaked much later for DA than for FA, which supports the idea of an asymmetrical allocation of processing resources to the disadvantage of the auditory modality in our DA condition.
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