【作者】 胡铭；

【导师】 王涛；

【作者基本信息】 东南大学 ， 英语语言文学， 2017， 硕士

【摘要】 语言的复杂性,准确性和流利性是衡量学习者语言水平发展的标准(Skehan,1998),且在二语生产的过程中不是各自独立而是通过互动关系起作用,这种互动关系通过外部和内部的多因果关系呈现出复杂的动态组合。比较主流的观点存在于Skehan的权衡假设(Trade-off Hypothesis)和 Robinson 的认知假设(Cognition Hypothesis)。不同于当前所普遍采用的横断面的研究设计,要全面了解学习者语言变化的特点,对学习者的语言发展进行跟踪调查必不可少。本研究旨在用动态系统理论来描述复杂性,准确性和流利性的变化特征并对三者的关系进行动态解释。研究总体上分为小组分析和一组个案研究。对60名来自四个不同工科专业的一年级研究生进行了为期九个月的历时研究,用动态的方法对收集的480个写作样本进行处理,重点在于借助动态系统理论的观点从复杂性的角度出发,对学生学术写作中的复杂性,准确性和流利性的变化轨迹进行分析,并观察复杂性与准确性,复杂性与流利性之间的动态关系。研究的结果在一定程度上支持了 Skehan的权衡假设。其中,小组研究的结果表明:高低分组的学生在词汇复杂性,语法复杂性,准确性和流利性四个方面的发展轨迹均呈现出非线性的特点,波峰和波谷,进步和磨蚀共存,体现出明显的动态性和变异性;高低分组在复杂性,准确性和流利性方面体现出不同的偏向:在低分组的写作中词汇复杂性和语法复杂性呈现竞争关系,却与准确性和流利性存在或弱或强的合作的关系;在高分组的写作中,虽然复杂性内部竞争较小,但随着时间的发展,复杂性与准确性,复杂性与流利性的竞争关系却贯穿始终。个案研究的结果显示:高低英语水平的两位学生写作中的复杂性,准确性和流利性和小组研究的结果并不完全一致,呈现出更大程度的波动并体现出不同的组合方式。这些发现对今后非英语专业研究生在学术写作中如何提高复杂性,准确性和流利性以及协调三者之间的关系有着重要的启示。更多还原

【Abstract】 Complexity,accuracy and fluency are three important and interdependent indexes to gauge language development which cannot be solely regarded.The main views considering CAF in SLA are Trade-of Hypothesis by Skehan and Cognition Hypothesis by Robinson.In this research,the interdependence and dynamicity of CAF and how they co-exist in an organic relationship in a written text are the major concerns and different from the commonly used cross-sectional design,dynamic longitudinal methods are applied in order to trace the development of students’ written language.This research aims to describe the developmental characteristics of CAF and provide dynamic explanations to their interactions within the framework of DST.The current research can be generally divided into two parts:group analysis and case study.60 grade one postgraduates from four different engineering faculties were studied in last nine months and 480 texts were collected and analyzed by dynamic approaches and techniques.The dynamic trajectories of CAF and the dynamic interactions between complexity and accuracy,complexity and fluency were presented and studied.The result of group study illustrates that students in both high and low proficiency group exhibit nonlinear developmental paths and high degree of variability in CAF,containing both progression and attrition.Different orientations of CAF development and organization can be observed:there is an apparent trade-off effect between lexical and grammatical complexity for low proficient students which is missing in high proficiency group whereas competitive relationships between complexity and accuracy,complexity and fluency are maintained by high proficient students throughout the time.The case study showed a different picture where much fluctuations and diverse organizing modes can be captured.The findings will provide important implications for non-English majors to improve complexity,accuracy and fluency and how to coordinate their relations in their academic writing.更多还原