Joint Doctoral Program in Language and Communicative Disorders, San Diego State University, University of California, San Diego, USA.
Joint Doctoral Program in Language and Communicative Disorders, San Diego State University, University of California, San Diego, USA.
Brain Lang. 2021 Jul;218:104960. doi: 10.1016/j.bandl.2021.104960. Epub 2021 Apr 30.
We used phonological priming and ERPs to investigate the organization of the lexicon in American Sign Language. Across go/no-go repetition detection and semantic categorization tasks, targets in related pairs that shared handshape and location elicited smaller N400s than targets in unrelated pairs, indicative of facilitated processing. Handshape-related targets also elicited smaller N400s than unrelated targets, but only in the repetition task. The location priming effect reversed direction across tasks, with slightlylargeramplitude N400s for targets in related versus unrelated pairs in the semantic task, indicative of interference. These patterns imply that handshape and location play different roles during sign recognition and that there is a hierarchical organization for the sign lexicon. Similar to interactive-activation models of word recognition, we argue for differentiation between sublexical facilitation and lexical competition. Lexical competition is primarily driven by the location parameter and is more engaged when identification of single lexico-semantic entries is required.
我们使用语音启动和事件相关电位来研究美国手语词汇的组织方式。在 Go/No-Go 重复检测和语义分类任务中，具有相同手型和位置的相关对目标比不相关对目标引发的 N400 更小，表明处理更加容易。与手型相关的目标也比不相关的目标引发的 N400 更小，但仅在重复任务中。位置启动效应在任务之间发生反转，在语义任务中，相关对目标的 N400 比不相关对目标的 N400 稍大，表明存在干扰。这些模式表明，手型和位置在手语识别过程中扮演不同的角色，并且手语词汇具有层次结构。与单词识别的交互式激活模型类似，我们认为应该区分亚词汇促进和词汇竞争。词汇竞争主要由位置参数驱动，当需要识别单个词汇语义条目时，它会更加活跃。
