Instructed foreign language knowledge – that is, language skills acquired exclusively in the classroom without the benefit of any significant immersion experience – remains a vastly neglected area of studies on language learning in general and language attrition in particular. There is also little consideration of foreign language attrition and maintenance as a problem for policy or pedagogy.

The present talk will give an overview of what is and what is not known about second language (L2) attrition at the present time. It will then present the results from a pilot project that will hopefully serve as the foundation for larger studies of instructed L2 attrition in future years.

受指导的外语知识——即在没有任何重要沉浸体验的情况下完全在课堂上获得的语言技能——仍然是一个被广泛忽视的一般语言学习研究领域，尤其是语言损耗研究。也很少考虑将外语流失和维持作为政策或教学法的问题。

目前的演讲将概述目前关于第二语言 (L2) 损耗的已知信息和未知信息。然后它将展示一个试点项目的结果，该项目有望成为未来几年对指导性 L2 损耗进行更大规模研究的基础。