Event-related potential indices of masked repetition priming
Event-related potential indices of masked repetition priming
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DOI：
10.1111/1469-8986.00012
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发表时间：
2003-01-01
期刊：
影响因子：
3.7
通讯作者：
Holcomb, PJ
中科院分区：
文献类型：
--
作者：
Misra, M;Holcomb, PJ
两个实验旨在确定事件相关电位（ERP）相关的掩蔽重复启动的单词列表，并验证这种效果是不是由于短暂的启动持续时间。在实验1中。掩蔽主要刺激，并对每个参与者单独滴定它们的持续时间。立即或延迟重复掩蔽引发的目标导致N400的衰减，几乎没有或没有增强的晚期阳性成分（LPC）。延迟，在明确的重复未掩蔽的目标导致衰减的N400和增强的LPC。实验2使用类似的刺激调谐参数，但启动被揭露。对于立即重复，观察到更典型的未掩蔽重复效应，包括N400的较大衰减和LPC的增强。这些研究结果进行了讨论，在目前的概念的N400和LPC的功能意义。
Two experiments sought to identify event-related potential (ERP) correlates of masked repetition priming of words in lists and to verify that such effects are not due to brief prime durations. In Experiment 1. prime stimuli were masked and their durations were individually titrated for each participant. Targets that were immediate or delayed repetitions of masked primes resulted in attenuation of the N400, with little or no enhancement of a late positive component (LPC). Delayed, in-the-clear repetitions Of unmasked targets led to attenuation of the N400 and enhancement of the LPC. Experiment 2 used similar stimulus tuning parameters, but primes were unmasked. More typical unmasked repetition effects were observed for immediate repetitions including a larger attenuation of the N400 and enhancement of the LPC. These findings are discussed within current notions of the functional significance of the N400 and LPC.