EVENT-RELATED BRAIN POTENTIALS AS INDEXES OF INFORMATION EXTRACTION AND RESPONSE PRIMING
EVENT-RELATED BRAIN POTENTIALS AS INDEXES OF INFORMATION EXTRACTION AND RESPONSE PRIMING
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DOI：
10.1016/0013-4694(90)90087-z
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发表时间：
1990-05-01
期刊：
影响因子：
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通讯作者：
DONCHIN, E
中科院分区：
文献类型：
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作者：
GRATTON, G;BOSCO, CM;DONCHIN, E
外显反应和事件相关脑电位（ERP）的措施被用来研究不同的信息内容的启动刺激的处理。受试者被显示2个字母的序列，作为启动和命令性刺激。在3个随机穿插的条件下，强制性刺激有0.80，0.50，或0.20的概率物理匹配的启动字母。不同的概率条件是通过启动字母两侧的点的位置来表示的。反应时间和准确性的数据表明，受试者启动他们的反应作为一个功能的信息所传达的启动刺激。P300对启动刺激的波幅和潜伏期对启动刺激所传递的信息量和所需加工的持续时间敏感。在前期准备电位偏侧化的启动刺激的功能。此外，更大的幅度的P300的启动刺激，更大的偏侧化的准备电位，表明信息提取，P300索引，相关的反应启动，索引的准备电位。结果表明，ERP测量显示了启动过程发生在前期的内隐方面。
Measures of overt response and of the event-related brain potential (ERP) were used to investigate the processing of a priming stimulus varying in its information content. Subjects were shown sequences of 2 letters that served as a priming and an imperative stimulus. In 3 randomly interspersed conditions the imperative stimulus had a 0.80, 0.50, or 0.20 probability of physically matching the priming letter. The different probability conditions were signaled by the position of a dot flanking the priming letter. Reaction time and accuracy data indicated that the subjects primed their responses as a function of the information conveyed by the priming stimulus. The amplitude and latency of the P300 to the priming stimulus were sensitive to the amount of information conveyed by the priming stimulus and the duration of the processing required. The readiness potential in the foreperiod was lateralized as a function of the priming stimulus. Furthermore, the larger the amplitude of the P300 to the priming stimulus, the larger the lateralization of the readiness potential, indicating that information extraction, indexed by the P300, was related to response priming, indexed by the readiness potential. The results indicate that ERP measures make manifest covert aspects of the priming process occurring in the foreperiod.