近年来，二语习得认知派和社会派一直交锋不断。《现代语言》（The Modern Language Journal）分别在1997年和2007年召集双方代表人物撰写文章，阐述各自观点。2014年《二语习得研究》（Studies in Second Language Acquisition）再次发表专题文章，介绍最新研究成果，重新认识两派分歧。为了厘清这场论争本质，本文以三次专刊为线索，将两派互动大致划分为三个时期（论战、关注和对话时期），重点讨论后现代思想起源、核心思想以及对二语习得研究对象、研究主客体关系、研究方法的影响。

There has been a constant debate between cognitive and social camps in SLA. In 1997 and 2007, The Modern Language Journal invited scholars to enumerate their diverse viewpoints, published in the Focus Issue. In 2014, Studies in Second Language Acquisition invited scholars from both camps to continue this dialogue and reconceptualize the key issues in a special article. Dividing the quarter century SLA research into three stages (the stage of debates, the stage of mutual concern and the stage of dialogues), this paper, therefore, aims at discovering the nature of the debates by illustrating the origin and fundamental concepts of the postmodernism. This trend contributes to the diverse conceptualization of research participants, the relationship between researchers and participants and research methods.