| Abstract | 第4-6页 |
| 摘要 | 第7-12页 |
| Lists of Abbreviations | 第12-14页 |
| Introduction | 第14-20页 |
| Chapter one Literature Review | 第20-44页 |
| 1.1 Studies on Writing Environment | 第20-26页 |
| 1.1.1 Definitions of Writing Environment | 第20-22页 |
| 1.1.2 Classifications of Writing Environment | 第22-26页 |
| 1.2 Studies on Syntactic Complexity | 第26-36页 |
| 1.2.1 Definitions of Syntactic Complexity | 第26-27页 |
| 1.2.2 Types of Syntactic Complexity | 第27-32页 |
| 1.2.3 Factors Influencing Syntactic Complexity | 第32-34页 |
| 1.2.4 Effects of Proficiency Levels on Syntactic Complexity | 第34-35页 |
| 1.2.5 Writing Quality and Syntactic Complexity | 第35-36页 |
| 1.3 Studies on the Effects of Writing Environment on Syntactic Complexity | 第36-40页 |
| 1.4 Summary | 第40-44页 |
| Chapter Two Theoretical Basis | 第44-56页 |
| 2.1 The Affective Filter Hypothesis | 第44-51页 |
| 2.2 The Output Hypothesis | 第51-56页 |
| Chapter Three Methodology | 第56-64页 |
| 3.1 Research Design | 第56-58页 |
| 3.1.1 Research Questions | 第56-57页 |
| 3.1.2 Research Subjects | 第57页 |
| 3.1.3 Research Instruments | 第57-58页 |
| 3.2 Research Procedure | 第58-64页 |
| 3.2.1 Data Collection | 第59-60页 |
| 3.2.2 Data Analysis | 第60-64页 |
| Chapter Four Results & Discussion | 第64-94页 |
| 4.1 Characteristics of Syntactic Complexity Across WTEE and WTRE | 第64-71页 |
| 4.2 Effects of WTEE and WTRE on Syntactic Complexity Across Highand Low Proficiency Groups | 第71-94页 |
| 4.2.1 Effects of WTEE and WTRE on Length of Production | 第71-75页 |
| 4.2.2 Effects of WTEE and WTRE on Sentence Complexity | 第75-78页 |
| 4.2.3 Effects of WTEE and WTRE on Subordination | 第78-84页 |
| 4.2.4 Effects of WTEE and WTRE on Coordination | 第84-89页 |
| 4.2.5 Effects of WTEE and WTRE on Phrasal Sophistication | 第89-94页 |
| Conclusion | 第94-102页 |
| Bibliography | 第102-116页 |
| Appendix Ⅰ Guidelines for Production Units and Syntactic Complexity Usedin This Study | 第116-120页 |
| Appendix Ⅱ Writing Topics for English Majors in WTEE | 第120-121页 |
| Appendix Ⅲ Writing Topics for English Majors in WTRE | 第121-122页 |
| Appendix Ⅳ Rating Criterion for the English Composition of TEM4 | 第122-124页 |
| Acknowledgements | 第124-126页 |
