State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China.
School of Education, University of Cincinnati, Cincinnati, Ohio, USA.
Hum Brain Mapp. 2023 Oct 15;44(15):5065-5078. doi: 10.1002/hbm.26433. Epub 2023 Jul 28.
Adopting highly sensitive multivariate electroencephalography (EEG) and alpha-band decoding analyses, the present study investigated proactive and reactive language control during bilingual language production. In a language-switching task, Chinese-English bilinguals were asked to name pictures based on visually presented cues. EEG and alpha-band decoding accuracy associated with switch and non-switch trials were used as indicators for inhibition over the non-target language. Multivariate EEG decoding analyses showed that the decoding accuracy in L1 but not in L2, was above chance level shortly after cue onset. In addition, alpha-band decoding results showed that the decoding accuracy in L1 rose above chance level in an early time window and a late time window locked to the stimulus. Together, these asymmetric patterns of decoding accuracy indicate that both proactive and reactive attentional control over the dominant L1 are exerted during bilingual word production, with a possibility of overlap between two control mechanisms. We addressed theoretical implications based on these findings for bilingual language control models.
采用高灵敏度的多变量脑电图（EEG）和 alpha 波段解码分析，本研究调查了双语语言产生过程中的主动和被动语言控制。在语言转换任务中，要求汉英双语者根据视觉呈现的线索命名图片。EEG 和 alpha 波段解码精度与转换和非转换试验相关，作为对非目标语言抑制的指标。多变量 EEG 解码分析表明，在提示后不久，解码精度在 L1 而不是 L2 中高于随机水平。此外，alpha 波段解码结果表明，在早期和晚期时间窗口中，L1 的解码精度均高于随机水平，该时间窗口锁定在刺激上。这些不对称的解码精度模式表明，在双语单词产生过程中，对主导 L1 的主动和被动注意力控制都被施加，两种控制机制可能存在重叠。我们根据这些发现，针对双语语言控制模型提出了理论意义。
