School of Speech, Language, and Hearing Sciences, San Diego State University, San Diego, USA; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Netherlands; Linguistics and Literary Studies, Vrije Universiteit Brussel, Brussels, Belgium.
Joint Doctoral Program in Language and Communicative Disorders, San Diego State University & University of California, San Diego, USA.
Neuropsychologia. 2021 Oct 15;161:108019. doi: 10.1016/j.neuropsychologia.2021.108019. Epub 2021 Sep 4.
It is currently unclear to what degree language control, which minimizes non-target language interference and increases the probability of selecting target-language words, is similar for sign-speech (bimodal) bilinguals and spoken language (unimodal) bilinguals. To further investigate the nature of language control processes in bimodal bilinguals, we conducted the first event-related potential (ERP) language switching study with hearing American Sign Language (ASL)-English bilinguals. The results showed a pattern that has not been observed in any unimodal language switching study: a switch-related positivity over anterior sites and a switch-related negativity over posterior sites during ASL production in both early and late time windows. No such pattern was found during English production. We interpret these results as evidence that bimodal bilinguals uniquely engage language control at the level of output modalities.
目前尚不清楚在何种程度上，语言控制（最大限度地减少非目标语言的干扰，增加选择目标语言词汇的概率）对于手语-言语（双模态）双语者和口语-言语（单模态）双语者是相似的。为了进一步研究双模态双语者的语言控制过程的本质，我们首次对美国手语（ASL）-英语双语者进行了事件相关电位（ERP）语言转换研究。结果显示出一种在任何单模态语言转换研究中都没有观察到的模式：在早期和晚期时间窗口中，在 ASL 产生期间，在前侧部位出现与转换相关的正性，在后侧部位出现与转换相关的负性。在英语产生期间未发现这种模式。我们将这些结果解释为双模态双语者在输出模态层面独特地参与语言控制的证据。
