P300, stimulus intensity, modality, and probability
P300, stimulus intensity, modality, and probability
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DOI：
10.1016/0167-8760(96)00028-1
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发表时间：
1996-08-01
影响因子：
3
通讯作者：
Cohen, J
中科院分区：
文献类型：
--
作者：
Polich, J;Ellerson, PC;Cohen, J
听觉和视觉刺激强度与目标概率的factorially操纵，以评估这些变量的事件相关脑电位（ERP）的P300成分的影响。刺激强度的增加产生可靠的P300振幅的增加和峰值潜伏期的减少，这两种方式是加性与概率效应。类似地，对于N100、P200和N200分量也观察到稍微较弱的刺激强度效应。研究结果表明，刺激强度有助于P300振幅和潜伏期的措施，在重要的方式，并讨论了在应用环境中使用ERP。
Auditory and visual stimulus intensity were manipulated factorially with target probability to assess the influence of these variables on the P300 component of the event-related brain potential (ERP). Increases in stimulus intensity produced reliable increases in P300 amplitude and decreases in peak latency for both modalities that were additive with probability effects. Similar, somewhat weaker stimulus intensity effects also were observed for the N100, P200, and N200 components. The findings suggest that stimulus intensity contributes to both P300 amplitude and latency measures in important ways and are discussed in relation to the use of ERPs in applied contexts.