The effects of prime visibility on ERP measures of masked priming
The effects of prime visibility on ERP measures of masked priming
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DOI：
10.1016/j.cogbrainres.2005.01.003
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发表时间：
2005-06-01
期刊：
影响因子：
--
通讯作者：
Grainger, J
中科院分区：
文献类型：
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作者：
Holcomb, PJ;Reder, L;Grainger, J
在两个实验中，使用事件相关电位测量了模式掩蔽启动词持续时间（40、80和120 ms）对后续目标词处理的影响。在实验1中，目标词要么是重复的前一个掩蔽启动词（car-CAR），要么是另一个不相关的词（job-CAR）。在实验2中，启动物和目标物要么在语义上相关（cap-HAT），要么不相关（car-HAT）。在不同启动持续时间内，不相关的目标词产生的N400比重复（实验1）或语义相关（实验2）的目标词产生的N400大，语义启动的N400效应总体上比重复启动的效应小。此外，在最短启动持续时间内，N400重复启动的大小仅略有下降，并且这种N400效应与启动分类性能之间没有关系。然而，最短持续时间的语义启动的大小相对于较长持续时间的语义启动的大小相对较小，并且与启动分类性能相关。这些发现在N400的功能意义以及一个模型的背景下进行了讨论，该模型在掩盖重复和语义启动期间论证了不同的机制。(c) 2005 Elsevier b.v.版权所有
In two experiments, the effect of the duration (40, 80 and 120 ms) of pattern masked prime words on subsequent target word processing was measured using event-related potentials. In Experiment 1, target words were either repetitions of the prior masked prime (car-CAR) or were another unrelated word (job-CAR). In Experiment 2, primes and targets were either semantically related (cap-HAT) or were unrelated (car-HAT). Unrelated target words produced larger N400s than did repeated (Exp 1) or semantically related (Exp 2) words across the different prime durations and these N400 priming effects tended to be smaller overall for semantic than repetition priming. Moreover, there was only a modest decline in the size of N400 repetition priming at the shortest prime durations, and there was no relationship between this N400 effect and a measure of prime categorization performance. However, the size of semantic priming at the shortest durations was relatively smaller than at longer durations and was correlated with prime categorization performance. The findings are discussed in the context of the functional significance of the N400 as well as a model that argues for different mechanisms during masked repetition and semantic priming. (c) 2005 Elsevier B.V All rights reserved.