EFFECTS OF TEMPORAL AND EVENT UNCERTAINTY IN DETERMINING WAVEFORMS OF AUDITORY EVENT RELATED POTENTIAL (ERP)
EFFECTS OF TEMPORAL AND EVENT UNCERTAINTY IN DETERMINING WAVEFORMS OF AUDITORY EVENT RELATED POTENTIAL (ERP)
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DOI：
10.1111/j.1469-8986.1976.tb00885.x
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发表时间：
1976-01-01
期刊：
影响因子：
3.7
通讯作者：
DONCHIN, E
中科院分区：
文献类型：
--
作者：
MCCARTHY, G;DONCHIN, E
在两个实验条件中的每一个中，人类受试者被呈现一系列音调；在每个实验中呈现两个音调(1500或1000赫兹)中的一个，概率分别为0.10或0.90。受试者计算稀有音调(P=.10)；这样计算的稀有音调通常与较大的。**图形**有关。组件。这两种情况的不同之处在于，一种是由受试者按下S按钮触发的铃声，另一种是由计算机触发的铃声。Schaefer和Marcus(1973)报告说，事件相关电位(Event-Related Potential，ERP)的所有成分由自触发音诱发，比由机器触发刺激诱发的成分小得多。目前的范式允许详细评估自我刺激对特定事件相关电位成分的影响，以及时间和事件不确定性的交互作用。使用主成分技术对数据进行分析。时间和事件的不确定性似乎都增加了.apprx对ERP的负面影响。140毫秒。延迟。在自我刺激条件下，在按下按钮之前存在缓慢的负电位，这一效应被混淆。不出所料，.**图形**。稀有音诱发的事件相关电位成分最大。时间的不确定性降低了.**图形**的幅度。在中央电极位置。一个很大的慢波出现在后面。**图形**。刺激呈现方式改变了其前后分布。时间和事件的不确定性似乎对事件相关电位成分的形态和分布有明显的影响。
In each of 2 experimental conditions, human subjects were presented a series of tones; 1 of 2 tones (1500 or 1000 Hz) were presented on each trial with a probability of .10 or .90, respectively. The subjects counted the rare (P = .10) tones; such counted rare tones were normally associated with a large .**GRAPHIC**. component. The 2 conditions differed in that in one, the tones were triggered by the subject''s button press; in the other the tones were triggered by computer. Schaefer and Marcus (1973) reported that all the components of event-related potentials (ERP) elicited by self-triggered tones were substantially smaller than those elicited by machine-triggered stimuli. The present paradigm allowed a detailed assessment of the effects of self-stimulation on specific ERP components as well as the interaction of temporal with event uncertainty. Data were analyzed using a Principal Components technique. Both temporal and event uncertainty appeared to augment a negative component of the ERP with .apprx. 140 ms. latency. Such effects were confounded by the presence of slow negative potentials preceding the button press in the self-stimulation conditions. As expected, the .**GRAPHIC**. component was largest for the ERP elicited by rare tones. Temporal uncertainty diminished the amplitude of .**GRAPHIC**. at central electrode sites. A large slow wave was present following .**GRAPHIC**. its anterior-posterior distribution was altered by mode of stimulus presentation. Temporal and event uncertainty seem to have distinct effects upon the morphology and distribution of ERP components.