Memory consolidation in second language neurocognition

Ekerdt, C., Takashima, A., & McQueen, J. M. (2023). Memory consolidation in second language neurocognition. In K. Morgan-Short, & J. G. Van Hell (Eds.), The Routledge handbook of second language acquisition and neurolinguistics. Oxfordshire: Routledge.
Acquiring a second language (L2) requires newly learned information to be integrated with existing knowledge. It has been proposed that several memory systems work together to enable this process of rapidly encoding new information and then slowly incorporating it with existing knowledge, such that it is consolidated and integrated into the language network without catastrophic interference. This chapter focuses on consolidation of L2 vocabulary. First, the complementary learning systems model is outlined, along with the model’s predictions regarding lexical consolidation. Next, word learning studies in first language (L1) that investigate the factors playing a role in consolidation, and the neural mechanisms underlying this, are reviewed. Using the L1 memory consolidation literature as background, the chapter then presents what is currently known about memory consolidation in L2 word learning. Finally, considering what is already known about L1 but not about L2, future research investigating memory consolidation in L2 neurocognition is proposed.
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