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Abstract：
Previous studies on crosslinguistic influence (CLI) on third language (L3) morphosyntactic acquisition have provided support for competing theories about the source(s) of CLI. The present study aimed to test if both L1 and L2 can be the source of CLI, and whether they influence L3 learning in similar or different ways. In particular, we aimed to add to our knowledge of the neural correlates of CLI by conducting an exploratory EEG study to investigate how L1 and L2 CLI affect L3 neural processing. Predictions based on the D/P model, which posited different memory systems sustaining L1 and L2, were tested. The findings confirmed both L1-sourced and L2-sourced facilitation on L3 morphosyntactic acquisition. Specifically, we suggest that L1-similarity showed a consolidating effect on L3 implicit knowledge and neurocognitive internalization, whereas L2-similarity contributed to enhanced L3 metalinguistic knowledge. This preliminary study is the first to investigate the neurocognitive mechanisms underlying CLI in L3 learning by natural language learners.
摘要：
先前关于跨语言影响（CLI）对第三语言（L3）形态句法习得的研究为有关CLI来源的竞争理论提供了支持。本研究旨在测试L1和L2是否都可以作为CLI的来源，以及它们是否以相似或不同的方式影响L3学习。特别是,我们旨在通过一项探索性脑电图研究来研究L1和L2CLI如何影响L3神经处理,从而增加我们对CLI的神经相关性的认识.基于D/P模型的预测，测试了维持L1和L2的不同存储系统。研究结果证实了L1来源和L2来源对L3形态句法习得的促进作用。具体来说,我们认为L1-相似性对L3内隐知识和神经认知内化有巩固作用，而L2相似性有助于增强L3元语言知识。这项初步研究是首次研究自然语言学习者L3学习中CLI的神经认知机制。
