CNRS-Institut de Neurosciences Cognitives de la Méditerranée, Marseille Cedex, France.
J Cogn Neurosci. 2010 Nov;22(11):2555-69. doi: 10.1162/jocn.2009.21398.
The aim of these experiments was to compare conceptual priming for linguistic and for a homogeneous class of nonlinguistic sounds, impact sounds, by using both behavioral (percentage errors and RTs) and electrophysiological measures (ERPs). Experiment 1 aimed at studying the neural basis of impact sound categorization by creating typical and ambiguous sounds from different material categories (wood, metal, and glass). Ambiguous sounds were associated with slower RTs and larger N280, smaller P350/P550 components, and larger negative slow wave than typical impact sounds. Thus, ambiguous sounds were more difficult to categorize than typical sounds. A category membership task was used in Experiment 2. Typical sounds were followed by sounds from the same or from a different category or by ambiguous sounds. Words were followed by words, pseudowords, or nonwords. Error rate was highest for ambiguous sounds and for pseudowords and both elicited larger N400-like components than same typical sounds and words. Moreover, both different typical sounds and nonwords elicited P300 components. These results are discussed in terms of similar conceptual priming effects for nonlinguistic and linguistic stimuli.
这些实验的目的是通过使用行为（错误百分比和 RT）和电生理措施（ERPs）来比较语言和同质非语言声音（冲击声）的概念启动。实验 1 的目的是通过从不同的材料类别（木材、金属和玻璃）创建典型和模糊的声音来研究冲击声分类的神经基础。与典型冲击声相比，模糊声音的 RT 更慢，N280 更小，P350/P550 成分更小，负慢波更大，因此，模糊声音比典型声音更难分类。在实验 2 中使用了类别归属任务。典型声音之后是来自同一类别或不同类别的声音或模糊声音。单词后面跟着单词、伪词或非词。模糊声音的错误率最高，伪词和非词都比相同的典型声音和单词引起更大的 N400 样成分。此外，不同的典型声音和非词都引起了 P300 成分。这些结果是根据非语言和语言刺激的相似概念启动效应来讨论的。
