基于潜在语义分析的方法测量英语专业学生写作的连贯程度

摘要

潜在语义分析是关于知识归纳和知识表征的新理论，也是分析文本语料库、确定词汇意义与短文意义之间相似度的一种方法。通过对大量出自原有的语料库或高纬度的“语义空间”的机读语言样本的处理，LSA能对所使用词汇、词串(包括句子、段落、或短文)做出表征。潜在语义分析是一种基于文本研究的有效方法，能够在语篇理解的过程中衡量文本的连贯程度，并已经被证实是一种自动、快速、准确的计算方法。 近年来，作为重要的语言能力之一，写作在英语教学中越来越受到关注。基于LSA的有效测量文本连贯程度和韩礼德和哈桑所提出的衔接、连贯理论以及他们关于衔接手段类型分类，采用潜在语义分析的奇异值分解和语言学中的统计方法，本文对70名英语专业大三学生所写的英语作文的连贯问题进行分析，并与专家对这些作文连贯程度的科学评价进行客观比较，分析结果表明，LSA对学生作文连贯性的评价与专家的评价结果基本一致，本文进而提出LSA能有效地测量学生写作的连贯性以及培养语篇连贯对英语学做教学有重要的指导意义。

目录

文摘

英文文摘

独创性说明和大连理工大学学位论文版权使用授权书

Introduction

1 Raising Question

1.1 The Statement of the Problem in Advanced Chinese Students' English Writing

1.2 The Problems of Coherence in Chinese Students' English Writing

1.3 The Researches on Coherence in Students' English Writings by Chinese Scholars

2 Theory of Coherence and LSA

2.1 The Importance of Coherence in Writing

2.1.1 The Definition of Coherence

2.1.2 The Relationship between Coherence and Cohesion

2.1.3 Coherence in Discourse Analysis

2.1.4 Coherence: An Important Criterion in Students' Writing

2.2 The Introduction to LSA

2.2.1 Definition of LSA

2.2.2 The Applications of LSA

2.2.3 LSA for Text-Based Research

2.2.4 The Measurement of Textual Coherence with LSA

2.2.5 Brief Discussion

3 Data Analysis of Coherence Measured by LSA in Chinese Students' English Writings

3.1 Research Procedure

3.2 Data Analysis and Results

3.2.1 The Data Analysis and Results of Micro Coherence by LSA

3.2.2 The Data Analysis and Results of Macro Coherence by LSA

4 Discussion and Conclusion

4.1 The Analysis of Statistical Data in Measuring Textual Coherence by Using LSA

4.2 Disadvantages of LSA in Measuring Textual Coherence

4.3 Reasons for Discontinuity of Coherence through LSA's Analysis

4.4 Some Points of View for the Relationship between Coherence and Cohesion through LSA

4.5 Implications for English Teaching by Using LSA to Measure the Textual Coherence

4.6 Conclusion

Bibliography

攻读硕士学位期间发表学术论文情况

Acknowledgements