P300 and probability: Comparison of oddball and single-stimulus paradigms
P300 and probability: Comparison of oddball and single-stimulus paradigms
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DOI：
10.1016/s0167-8760(96)00742-8
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发表时间：
1997-02-01
影响因子：
3
通讯作者：
Margala, C
中科院分区：
文献类型：
--
作者：
Polich, J;Margala, C
P300 事件相关脑电位 (ERP) 是通过两项不同任务中的听觉刺激引发的。奇怪的范式同时呈现了目标刺激和标准刺激；单刺激范式提出了一个目标，但没有标准音调刺激，目标间间隔与奇怪条件下的间隔相同。在不同条件下（0.10、0.30、0.50、0.70、0.90），在奇怪的任务中操纵目标刺激概率。单刺激范式采用相同的程序，使得目标间间隔与概率变化的奇怪条件的间隔相同。对于不同概率水平的奇怪程序和单刺激程序，P300 幅度和潜伏期相似。每个任务的 P300 值之间的相关性模仿了奇怪范式的重测比较中的相关性。研究结果表明，单刺激范式中的 P300 以与传统怪异模式相同的方式对目标刺激概率做出反应。单刺激技术的含义在需要非常简单的 ERP 任务条件的应用环境中进行了讨论。 (C) 1997 Elsevier Science B.V.
The P300 event-related brain potential (ERP) was elicited with auditory stimuli in two different tasks. The oddball paradigm presented both target and standard stimuli; the single-stimulus paradigm presented a target but no standard tone stimulus, with the inter-target interval the same as that for the oddball condition. Target stimulus probability was manipulated in the oddball task in different conditions (0.10, 0.30, 0.50, 0.70, 0.90). The single-stimulus paradigm employed the same procedures such that the inter-target interval was identical as that for the oddball condition across changes in probability. P300 amplitude and latency were similar for both the oddball and single-stimulus procedures across probability levels. Correlations between the P300 values from each task mimicked those from test-retest comparisons for the oddball paradigm. The findings suggest that P300 from the single-stimulus paradigm responds to target stimulus probability in the same fashion as the traditional oddball. The implications of the single-stimulus technique are discussed in terms of applied contexts that require very simple ERP task conditions. (C) 1997 Elsevier Science B.V.