Evidence for an integrative role of P3b in linking reaction to perception
Evidence for an integrative role of P3b in linking reaction to perception
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DOI：
10.1027/0269-8803.19.3.165
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发表时间：
2005-01-01
影响因子：
1.3
通讯作者：
Wascher, E
中科院分区：
文献类型：
--
作者：
Verleger, R;Jaskowski, P;Wascher, E
关于事件相关EEG电位的P3分量的假设通常假设P3b反映了一些独立于组织反应的处理。相反，P3b与决策过程相关的概念意味着刺激和反应之间的某种中介功能。如果P3b确实感觉到了知觉加工和反应准备之间的联系，那么（1）反应锁定平均值的振幅应该和刺激锁定平均值的振幅一样大，（2）对于慢反应和快反应的单独子平均值，这应该与反应速度无关，（3）在刺激锁定和反应锁定平均值中，潜伏期应该随反应速度而变化。这些假设进行了测试，在选择反应任务中的视觉和听觉刺激诱发的数据。这三个预测都得到了证实。与这种与感知和反应的平衡关系相反，具有听觉刺激的额中央P3与刺激相关，并且作为比较，反应力和侧化准备电位的峰值振幅都与反应相关。我们的结论是，P3B反映了一个过程，中介之间的感知分析，和，响应启动，可能监测是否决定分类一些刺激适当转化为行动。
Hypotheses about the P3 component of the event-related EEG potential have usually assumed that P3b reflects some processing independent from organizing the response. In contrast, the notion that P3b is related to a decision process implies some mediating function between stimulus and response. If P3b does indeed felect the link between perceputal processing and response preparation (1) amplitudes should be as large in response-locked averages as in stimulus-locked averages, (2) this should be true independent of response speed, for separate subaverages of slow and fast responses, and (3) latencies should vary across response speed both in stimulus-locked and in response-locked averages. These hypotheses were tested in data evoked by visual and auditory stimuli in choice-response tasks. All three predictions were confirmed. In contrast to this balanced relation to perceptions and responding, fronto-central P3 with auditory stimuli was stimulus-related and, for comparison, the peak amplitudes of both the response-force and of the lateralized readiness potential were response-related. We conclude that P3b reflects a process that mediates between perceptual analysis,and, response initiation, possibly monitoring whether the decision to classify some stimulus is appropriately transformed into action.