Semantic processing in children with cochlear implants: Evidence from event-related potentials
Semantic processing in children with cochlear implants: Evidence from event-related potentials
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DOI：
10.1080/13803395.2019.1592119
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发表时间：
2019-03-29
影响因子：
2.2
通讯作者：
Wilson, Wayne J.
中科院分区：
文献类型：
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作者：
Bell, Nicola;Angwin, Anthony J.;Wilson, Wayne J.
简介：现有的研究表明，使用人工耳蜗（CI）的严重听力损失儿童在口语行为测量方面的表现比听力正常的同龄人差。本研究旨在探讨如何与CI儿童的过程中的词汇语义不一致，作为索引的N400效应的电生理证据。方法：12名年龄在6 ~ 9岁之间的CI儿童参加了一项口语单词-图片匹配任务，同时记录了事件相关电位（ERP）。为了确定该组中引起的N400效应是否偏离正常，使用独立样本t检验和方差分析（ANOVA）分析来比较具有CI的儿童与年龄相似的典型听力（TH）组（n = 30）的结果。在每组中也进行了相关性分析，以衡量N400效应与口语行为测量的相关程度。结果：CI组和TH组儿童均出现N400效应。N400效应的振幅和潜伏期在组间没有显著差异。尽管在ERP反应的相似性，CI的儿童得分显着较低的行为措施，口语单词和口语水平的理解。没有发现ERP和行为指标之间的显着相关性，虽然有一个趋势之间的关系，初级口语理解和TH组的N400效应的平均幅度（p = 0.060）。结论：结果表明，在神经水平上，儿童与CI可以处理词汇语义不一致，和其他潜在的过程不测量的N400效应有助于这个人口的口语困难。
Introduction: Existing research has shown that children with significant hearing loss who use cochlear implants (CIs) perform worse than their hearing peers on behavioral measures of spoken language. The present study sought to examine how children with CIs process lexical-semantic incongruence, as indexed by electrophysiological evidence of the N400 effect. Method: Twelve children with CIs, aged between 6 and 9 years, participated in a spoken word-picture matching task while event-related potentials (ERPs) were recorded. To determine whether the N400 effect elicited in this group deviated from normal, independent samples t tests and analysis of variance (ANOVA) analyses were used to compare the results of children with CIs against those of a similarly aged typically hearing (TH) group (n = 30). Correlational analyses were also conducted within each group to gauge the degree to which the N400 effect related to behavioral measures of spoken language. Results: An N400 effect was elicited in both groups of CI and TH children. The amplitude and latency of the N400 effect did not differ significantly between groups. Despite the similarity in ERP responses, children with CIs scored significantly lower on behavioral measures of spoken word- and sentence-level comprehension. No significant correlations between ERP and behavioral measures were found, although there was a trending relationship between sentence-level spoken language comprehension and the TH group's N400 effect mean amplitude (p = .060). Conclusions: The results suggest that, at a neural level, children with CIs can process lexical-semantic incongruence, and that other underlying processes not measured by the N400 effect contribute to this population's spoken language difficulties.