第二语言习得(简称二语习得),通常指母语习得之后的任何其他语言学习。人们从社会、心理、语言学等角度去研究它。第二语言习得研究作为一个独立学科,大概形成于二十世纪60年代末70年代初,已有35年的历史。它对学习者的第二语言特征及其发展变化、学习者学习第二外语时所具有的共同特征和个别差异进行描写,并分析影响二语习得的内外部因素。与其他社会科学相比,二语习得研究是个新领域,大都借用母语研究、教育学研究或其他相关学科的方法。概括地说,这一领域的研究是为了系统地探讨二语习得的本质和习得的过程,其主要目标是:描述学习者如何获得第二语言以及解释为什么学习者能够获得第二语言。到目前为止,二语习得的研究范围远比20世纪七八十年代广,涉及语言学、心理学、心理语言学、语用学,社会语言学等众多方面。/r/n/r/n这是二语习得的英文定义:/r/n/r/nSecond language acquisition, or SLA, is the processes by which people learn languages in addition to their native tongue(s) Just as second language is the standard term for any language whose acquisition starts after early childhood, including what is chronologically the third or subsequent language, SLA is the acquisition of any second The language to be learned is often referred to as the "target language" or "L2" (and SLA is often called L2A, for "L2 acquisition")
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