Effects of working memory load on lexical-semantic encoding in language production
Effects of working memory load on lexical-semantic encoding in language production
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DOI：
10.3758/pbr.15.2.357
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发表时间：
2008-04-01
影响因子：
3.5
通讯作者：
Belke, Eva
中科院分区：
文献类型：
--
作者：
Belke, Eva
一些语言生成中的词汇获取模型假设词汇语义编码是由概念输入自底向上驱动的，由任务表示自顶向下驱动的。在循环语义阻塞范式中，参与者反复命名语义相关或不相关的对象集。语义相关性的操作以自下而上的方式影响词汇语义编码，而小对象集的循环表示允许参与者自上而下地偏爱相应的词汇语义表示进行选择。工作记忆在这种自上而下的调节中所起的作用通过循环语义阻塞范式与工作记忆负荷的操纵进行了研究。被试的命名延迟表现出语义上下文、WM负载和交互的显著影响。使用相同材料的单词命名任务产生了WM负载的主要影响，但语义上下文及其与WM负载的交互作用没有显著影响。这些和相关的结果讨论了他们对语言产生模型的影响。
Some models of lexical access in language production postulate that lexical-semantic encoding is driven bottom-up, by the conceptual input, and top-down, by a representation of the task. In the cyclic semantic blocking paradigm, participants repeatedly name sets of objects that are either semantically related or unrelated. Whereas the manipulation of semantic relatedness affects lexical-semantic encoding in a bottom-up fashion, the cyclic presentation of small object sets allows participants to bias the corresponding lexical-semantic representations top-down for selection. The role of working memory (WM) in this top-down modulation was investigated by crossing the cyclic semantic blocking paradigm with a manipulation of WM load. Participants' naming latencies displayed significant effects of semantic context, WM load, and their interaction. A word-naming task using the same materials yielded a main effect of WM load but no significant effects of semantic context or of its interaction with WM load. These and related results are discussed with regard to their implications for models of language production.