历史语言学的研究还可以使我们对非语言的因素，如社会文化和心理因素等在语言变化过程中所起的作用有更深的认识。

The historical study of language also enables us to determine how non-linguistic factors, such as social, cultural and psychological factors, interact over time to trigger linguistic change.

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We then promised to move to an emphasis on psychological matters, and finally social and cultural determinants of literature.

然后我们把重点转移到了心理学，最后还讨论了社会和文化对文学的决定因素。

耶鲁公开课 - 文学理论导论课程节选