Investigating Second Language Writing: A Sociocultural Theory Perspective

本文以社会文化理论(Sociocultural Theory, SCT)的三代模型为脉络，系统阐释Vygotsky的中介三角模型、Leont’ev的层级模型与Engeström的双三角活动系统模型的理论内核及其在二语写作领域的应用价值。研究揭示了三代模型从个体认知到社会协作、从静态结构到动态系统的理论演进逻辑。在此基础上，本研究从三个方面提出二语写作未来的研究方向：1) 神经调节——通过FMRI观测社会互动对二语写作神经回路的调节效应；2) 关系重构——解析AI写作对传统“作者–文本–读者”关系链的重构机制；3) 本土理论创新——构建汉语二语写作的语料库，建立兼顾中西思维和文化取向的写作发展模型。This study systematically examines the theoretical core of three generations of Sociocultural Theory (SCT) models—Vygotsky’s mediational triangle model, Leont’ev’s hierarchical model, and Engeström’s dual-triangle activity system model—and their application value in the field of second language (L2) writing. The research elucidates the logic of the theoretical evolution from individual cognition to social collaboration, from static structures to dynamic systems across the three generations of models. Based on this foundation, the study proposes three future research directions for L2 writing: 1) Neural Modulation—investigating the regulatory effects of social interaction on L2 writing neural circuits through FMRI observation; 2) Relational Reconstruction—analyzing the restructuring mechanisms of AI writing on the traditional “author-text-reader” chain; 3) Domestic Theoretical Innovation—Constructing a Chinese L2 writing corpus to establish a writing developmental model integrating both Chinese-Western thinking and cultural orientations.