This study used the bibliometric method to examine the field of second language acquisition (SLA) between 1997 and 2018 to provide a systematic overview of the field and to discover major trends in SLA. Based on citation/cocitation information and keywords retrieved from Web of Science, this study performed three types of bibliometric analyses to identify the prominent scholarly documents, authors, research institutions, geographic regions, and research topics that have been highly influential in the field of SLA over the last two decades. The scientific network maps and the keyword analysis revealed a number of significant changes as well as new trends in the field.

中文翻译：

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1997 年至 2018 年间第二语言习得的文献计量分析

本研究使用文献计量方法对 1997 年至 2018 年间的第二语言习得 (SLA) 领域进行了研究，以提供对该领域的系统概述并发现 SLA 的主要趋势。本研究基于从 Web of Science 检索到的引文/共引信息和关键词，进行了三种类型的文献计量分析，以确定在 SLA 领域具有高度影响力的著名学术文献、作者、研究机构、地理区域和研究主题在过去的二十年里。科学的网络图和关键词分析揭示了该领域的一些重大变化和新趋势。