Inter-individual variability in morphological processing: An ERP study on German plurals

IF 1.2 3区 心理学 Q2 LINGUISTICS
Laura Anna Ciaccio , Audrey Bürki , Harald Clahsen
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引用次数: 0

Abstract

Previous studies on the neuro-cognition of language have provided a strong case for systematic inter-individual variability in event-related potentials (ERPs) evoked during language processing. In the present study, we aimed at extending this evidence to the processing of morphologically complex words. We focused on German plural forms and tested two types of morphological violations: overapplications of regular plural morphemes (‘regularizations’) and of irregular plural morphemes (‘irregularizations’). The group-level results showed a biphasic LAN-P600 response for regularizations, and a P600 for irregularizations. In line with previous reports, our analyses of inter-individual variability suggested that biphasic responses consisting of a negativity followed by a positivity are unlikely to exist at the individual level. Importantly, when analyzing the scalp distribution of ERPs elicited in participants supposed to show negativity-dominant responses, we found this to vary as a function of the type of morphological form: regularizations elicited a left-hemisphere response (LAN), while irregularizations a more widespread negativity (N400). Our results are consistent with dual-route accounts of morphological processing that distinguish between rule-based processing for regular inflection and memory retrieval for irregular inflection. At a more general level, our study shows that complementing group-level results with analyses of inter-individual variability can crucially contribute to a more detailed understanding of brain signatures of language.

形态加工的个体间变异:德语复数的ERP研究
对语言神经认知的研究已经为语言加工过程中事件相关电位的系统性个体差异提供了强有力的证据。在本研究中,我们的目的是将这一证据扩展到词形复杂的词的加工。我们专注于德语的复数形式,并测试了两种形态违规:规则复数语素的过度使用(“正则化”)和不规则复数语素的过度使用(“非正则化”)。组水平的结果显示,LAN-P600双相反应的规则,和P600的非规则。与之前的报告一致,我们对个体间变异性的分析表明,在个体层面上,由消极和积极组成的双相反应不太可能存在。重要的是,当分析被试的头皮上erp的分布时,我们发现这种情况随着形态类型的变化而变化:正则化引发左半球反应(LAN),而非正则化则引发更广泛的负性反应(N400)。我们的结果与区分基于规则的规则屈折处理和不规则屈折的记忆检索的形态学处理的双路径解释是一致的。在更普遍的层面上,我们的研究表明,用个体间差异的分析来补充群体水平的结果,对更详细地理解语言的大脑特征至关重要。
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来源期刊
Journal of Neurolinguistics
Journal of Neurolinguistics 医学-神经科学
CiteScore
3.90
自引率
5.00%
发文量
49
审稿时长
17.2 weeks
期刊介绍: The Journal of Neurolinguistics is an international forum for the integration of the neurosciences and language sciences. JNL provides for rapid publication of novel, peer-reviewed research into the interaction between language, communication and brain processes. The focus is on rigorous studies of an empirical or theoretical nature and which make an original contribution to our knowledge about the involvement of the nervous system in communication and its breakdowns. Contributions from neurology, communication disorders, linguistics, neuropsychology and cognitive science in general are welcome. Published articles will typically address issues relating some aspect of language or speech function to its neurological substrates with clear theoretical import. Interdisciplinary work on any aspect of the biological foundations of language and its disorders resulting from brain damage is encouraged. Studies of normal subjects, with clear reference to brain functions, are appropriate. Group-studies on well defined samples and case studies with well documented lesion or nervous system dysfunction are acceptable. The journal is open to empirical reports and review articles. Special issues on aspects of the relation between language and the structure and function of the nervous system are also welcome.
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