关键词: 二语习得, 词频统计, 共词分析, 可视化

Abstract: The paper adopts word frequency and co-word analysis in an attempt to get the research focuses and fronts in SLA by analyzing the keywords in articles published during 2006-2011, and also uses visualization tool to draw the mapping knowledge domains of recent SLA research. The survey reveals that the focuses and fronts are mainly about SLA at the syntactic level, the description of interlanguage's features, and classroom-based language education. It could be seen that the cross-over studies between SLA and other disciplines, such as cognition science and neuroscience, cover many areas, displaying SLA's interdisciplinary feature. This study, therefore, is a good reference for SLA researchers to quickly get access to the research fronts and focuses, and then choose their own research interests.