| Acknowledgements | 第5-7页 |
| 摘要 | 第7-9页 |
| Abstract | 第9-11页 |
| Abbreviations | 第13-16页 |
| Chapter 1 Introduction | 第16-20页 |
| 1.1 Research Background | 第16-17页 |
| 1.2 Research Purpose | 第17-18页 |
| 1.3 Research Significance | 第18页 |
| 1.4 Organization of This Thesis | 第18-20页 |
| Chapter 2 Literature Review | 第20-30页 |
| 2.1 Previous Studies on Lexical Complexity | 第20-23页 |
| 2.1.1 Previous Studies on Lexical Complexity Abroad | 第20-22页 |
| 2.1.2 Previous Studies on Lexical Complexity Domestically | 第22-23页 |
| 2.2 Previous Studies on Syntactic Complexity | 第23-27页 |
| 2.2.1 Previous Studies on Syntactic Complexity Abroad | 第24-26页 |
| 2.2.2 Previous Studies on Syntactic Complexity at Home | 第26-27页 |
| 2.3 Summary | 第27-30页 |
| Chapter 3 Theoretical Framework | 第30-39页 |
| 3.1 L2 Proficiency Model: Complexity Accuracy and Fluency | 第30-31页 |
| 3.2 Theories on Lexical Complexity | 第31-34页 |
| 3.2.1 Definition of Lexical Complexity | 第31-32页 |
| 3.2.2 Measures of Lexical Complexity | 第32-34页 |
| 3.3 Theories on Syntactic Complexity | 第34-39页 |
| 3.3.1 Definition of Syntactic Complexity | 第34-35页 |
| 3.3.2 Measures of Syntactic Complexity | 第35-39页 |
| Chapter 4 Research Methodology | 第39-50页 |
| 4.1 Research Questions | 第39页 |
| 4.2 Research subjects | 第39-40页 |
| 4.3 Research Instruments | 第40-43页 |
| 4.3.1 Coh-Metrix 3.0 | 第40-41页 |
| 4.3.2 L2 Syntactic Complexity Analyzer (L2SCA) | 第41-42页 |
| 4.3.3 Lexical Complexity Analyzer (LCA) | 第42-43页 |
| 4.3.4 SPSS 22.0 | 第43页 |
| 4.4 Corpora Clooection and Processing of Data | 第43-45页 |
| 4.5 Data Analysis | 第45-49页 |
| 4.6 Summary | 第49-50页 |
| Chapter 5 Results and Discussions | 第50-73页 |
| 5.1 Differences between High- and Low- Score Writings | 第50-58页 |
| 5.1.1 Differences in Indices of Lexical Complexity | 第50-53页 |
| 5.1.2 Differences in Indices of Syntactic Complexity | 第53-58页 |
| 5.2 Correlations between Complexity Measures and Writing Proficiency | 第58-63页 |
| 5.2.1 Lexical Complexity Measures and Writing Proficiency | 第59-61页 |
| 5.2.2 Syntactic Complexity Measures and Writing Proficiency | 第61-63页 |
| 5.3 Linear Regression Relationship between Complexity Measures and Writing Proficiency | 第63-72页 |
| 5.4 Summary | 第72-73页 |
| Chapter 6 Conclusions | 第73-79页 |
| 6.1 Major Findings of This Study | 第73-75页 |
| 6.2 Implications of This Study | 第75-76页 |
| 6.2.1 Theoretical Implications | 第75页 |
| 6.2.2 Methodological Implications | 第75-76页 |
| 6.2.3 Pedagogical Implications | 第76页 |
| 6.3 Limitations of This Study | 第76-77页 |
| 6.4 Suggestions for Further Study | 第77-79页 |
| Bibliography | 第79-85页 |
| Appendix I Jacobs et al.'s (1981) scoring profile | 第85-87页 |
| Papers Published During the Study for M. A. Degree | 第87页 |
