| 摘要 | 第6-8页 |
| Abstract | 第8-9页 |
| List of Abbreviations | 第13-14页 |
| Chapter One Introduction | 第14-18页 |
| 1.1 Research Background and Research Questions | 第14-16页 |
| 1.2 Significance of the Research | 第16-17页 |
| 1.3 Overall Organization of the research | 第17-18页 |
| Chapter Two Theoretical Background and Relevant Studies | 第18-35页 |
| 2.1 Definition of Task and Task Complexity | 第18-21页 |
| 2.2 Influential Models of Task Complexity | 第21-24页 |
| 2.2.1 Skehan & Foster's Limited Attentional Capacity Model | 第21-22页 |
| 2.2.2 Robinson's Cognition Hypothesis | 第22-24页 |
| 2.3 Syntactic Complexity | 第24-29页 |
| 2.3.1 Syntactic Complexity by Wolf-Quintero et al | 第24-25页 |
| 2.3.2 Syntactic Complexity by Biber et al | 第25-29页 |
| 2.3.3 Syntactic Complexity on Passives | 第29页 |
| 2.4 Previous Studies | 第29-35页 |
| 2.4.1 Studies on Task Complexity and L2 Language Performance | 第29-32页 |
| 2.4.2 Studies on Syntactic Complexity | 第32-35页 |
| Chapter Three Methodology | 第35-43页 |
| 3.1 Subjects | 第35页 |
| 3.2 Instruments | 第35-38页 |
| 3.2.1 Recall Writing Task | 第35-36页 |
| 3.2.2 Free Topic Writing Task | 第36-37页 |
| 3.2.3 Summary Writing Task | 第37-38页 |
| 3.3 Measurements of Syntactic Complexity | 第38-41页 |
| 3.3.1 Syntactic Complexity Measurements in Conversational Discourse | 第38-39页 |
| 3.3.2 Syntactic Complexity Measurements in Academic Discourse | 第39-41页 |
| 3.4 Data Collection and Coding | 第41-42页 |
| 3.4.1 Data Collection | 第41-42页 |
| 3.4.2 Data Coding | 第42页 |
| 3.5 Statistical Analysis of the Data | 第42-43页 |
| Chapter Four Results and Discussion | 第43-64页 |
| 4.1 Effect of Task Complexity on Syntactic Complexity Indices Favored in Conversational Discourse | 第43-51页 |
| 4.1.1 Effect of Task Complexity on the Use of Object Clauses | 第43-46页 |
| 4.1.2 Effect of Task Complexity on the Use of Adverbial Clauses | 第46-48页 |
| 4.1.3 Effect of Task Complexity on the Use of Predicative Clauses | 第48-51页 |
| 4.2 Effect of Task Complexity on Syntactic Complexity Indices Favored in Academic Discourse | 第51-64页 |
| 4.2.1 Effect of Task Complexity on the Use of NP Modifiers | 第51-55页 |
| 4.2.2 Effect of Task Complexity on the Use of Passives | 第55-58页 |
| 4.2.3 Effect of Task Complexity on the Use of Adverbial Phrases | 第58-61页 |
| 4.2.4 Effect of Task Complexity on the Use of Nominal Verb Phrases | 第61-64页 |
| Chapter Five Conclusion | 第64-69页 |
| 5.1 Major Findings of the Study | 第64-66页 |
| 5.2 Pedagogical Implications | 第66-68页 |
| 5.3 Limitations of the Study and Suggestions for Future Research | 第68-69页 |
| Acknowledgements | 第69-70页 |
| Bibliography | 第70-77页 |
| Appendix 1: Hypothesized Developmental Stages for Complexity Features | 第77-79页 |
| Appendix 2: Original Text of Recall Writing Task | 第79-81页 |
| Appendix 3: Original Text of Summary Writing Task | 第81-83页 |
| Publications while Registered with the MA Program | 第83页 |
