SPECIFIC LANGUAGE IMPAIRMENT AND THE LEXICON

这项研究计划旨在探讨 特殊语言障碍（SLI）儿童的词汇。 的 研究计划基于以下前提：（1）词汇产生 SLI儿童的问题根源于词汇储存的缺陷; (2)有SLI和没有SLI的儿童之间的比较可以用来 描述与SLI相关的词汇储存缺陷的性质 （3）对这些词汇储存缺陷有了更全面的认识 将导致更有效的处理词汇生产， SLI患儿 参与者是20名患有SLI的学龄前儿童， 40个正常发育的年龄匹配的队列和他们的40个正常- 发展中的、年轻的、语言匹配的群体。 这些实验 受Levelt（1991）的言语产生模型的启发， 特别是他的词元和词位表示和访问的概念。 具体地说，假设引理特别是 在SLI儿童中发育不全，这个问题可以追溯到 回到早期单词学习时的非典型语义映射。 四 实验的目的是调查的组织和阐述 语义词典的一部分。 第五个实验旨在确定 当患有SLI的儿童和 他们的同伴会绘制新单词。 第六个实验将测试 旨在改善儿童词汇生产的干预措施， SLI通过增强他们的语义知识。

This program of research is designed to explore the status of the lexicon in young children with specific language impairment (SLI). The research plan is based on the premises that: (1) the lexical production problems of children with SLI are rooted in deficits in lexical storage; (2) comparisons between children with and without SLI can be used to characterize the nature of lexical storage deficits associated with SLI and (3) a more complete understanding of these lexical storage deficits will lead to more efficacious treatment for lexical production in children with SLI. Participants are 20 preschoolers who have SLI, their 40 normally-developing age-matched cohorts and their 40 normally- developing, younger, language-matched cohorts. These experiments are motivated by Levelt's (1991) speech production model, and, in particular, his notion of lemma and lexeme representation and access. Specifically, it is hypothesized that the lemma is particularly underdeveloped in children with SLI and that this proble may be traced back to atypical semantic mapping during early word learning. Four experiments are designed to investigate the organization and elaboration of the semantic lexicon. A fifth experiment is designed to determine what semantic information is initially stored when children with SLI and their cohorts map new words. A sixth experiment will test the efficacy of intervention aimed at improving lexical production for children with SLI by enhancing their semantic knowledge.