| Abstract | 第9-10页 |
| 摘要 | 第11-12页 |
| List of Abbreviations | 第12-15页 |
| Chapter One Introduction | 第15-18页 |
| 1.1 Background of the study | 第15-16页 |
| 1.2 Significance of the study | 第16页 |
| 1.3 Purpose of the study | 第16-17页 |
| 1.4 Outline of the study | 第17-18页 |
| Chapter Two Literature Review | 第18-29页 |
| 2.1 Studies on Task Complexity | 第18-22页 |
| 2.1.1 The Definition of Task Complexity | 第18-19页 |
| 2.1.2 Studies of Task Complexity and Second Language Writing | 第19-22页 |
| 2.2 Studies on Working Memory | 第22-26页 |
| 2.2.1 The Definition of Working Memory | 第22-23页 |
| 2.2.2 The Measurement of Working Memory | 第23-24页 |
| 2.2.3 Studies of Working Memory and Second Language Writing | 第24-26页 |
| 2.3 Studies on Task Complexity and Working Memory | 第26-28页 |
| 2.3.1 Relationship between Task Complexity and Working Memory | 第26-27页 |
| 2.3.2 Studies of Effects of Task Complexity and Working Memory on Second Language Acquisition | 第27-28页 |
| 2.4 Summary | 第28-29页 |
| Chapter Three Theoretical Framework | 第29-36页 |
| 3.1 Two Models of Task Complexity | 第29-32页 |
| 3.1.1 Skehan's Limited Attentional Capacity Model | 第29-31页 |
| 3.1.2 Robinson's Multiple Attentional Resources Model | 第31-32页 |
| 3.2 The Working Memory Model | 第32-34页 |
| 3.3 Kellogg’s Writing Model | 第34-35页 |
| 3.4 Summary | 第35-36页 |
| Chapter Four Research Design | 第36-47页 |
| 4.1 Research Questions | 第36页 |
| 4.2 Participants | 第36-37页 |
| 4.3 Variables | 第37页 |
| 4.4 Instruments | 第37-44页 |
| 4.4.1 The pre-test | 第38-39页 |
| 4.4.2 Writing Tasks | 第39-40页 |
| 4.4.3 The Working Memory Span Task | 第40-43页 |
| 4.4.4 Writing Proficiency Measurements | 第43-44页 |
| 4.5 Procedures | 第44-47页 |
| Chapter Five Results and Discussion | 第47-66页 |
| 5.1 The Effect of Task Complexity on Second Language Writing | 第47-52页 |
| 5.1.1 The Effect of Task Complexity on Accuracy | 第47-48页 |
| 5.1.2 The Effect of Task Complexity on Fluency | 第48-50页 |
| 5.1.3 The Effect of Task Complexity on Lexical Complexity | 第50-51页 |
| 5.1.4 The Effect of Task Complexity on Syntactic Complexity | 第51-52页 |
| 5.2 The Effect of Working Memory on Second Language Writing | 第52-58页 |
| 5.2.1 The Effect of Working Memory on Accuracy | 第53-54页 |
| 5.2.2 The Effect of Working Memory on Fluency | 第54-56页 |
| 5.2.3 The Effect of Working Memory on Lexical Complexity | 第56-57页 |
| 5.2.4 The Effect of Working Memory on Syntactic Complexity | 第57-58页 |
| 5.3 The Correlation between Task Complexity and Working Memory | 第58-61页 |
| 5.3.1 The Correlation between Task Complexity and Working Memory in Terms of Accuracy | 第58-59页 |
| 5.3.2 The Correlation between Task Complexity and Working Memory in Terms of Fluency | 第59页 |
| 5.3.3 The Correlation between Task Complexity and Working Memory in Terms of Lexical Complexity | 第59-60页 |
| 5.3.4 The Correlation between Task Complexity and Working Memory in Terms of Syntactic Complexity | 第60-61页 |
| 5.4 Discussions | 第61-66页 |
| 5.4.1 The Effect of Task Complexity on Writing Proficiency | 第61-63页 |
| 5.4.2 The Effect of Working Memory on Writing Proficiency | 第63-65页 |
| 5.4.3 The Correlation between Task Complexity and Working Memory | 第65-66页 |
| Chapter Six Conclusion | 第66-70页 |
| 6.1 Major Findings | 第66页 |
| 6.2 Pedagogical Implications | 第66-68页 |
| 6.3 Limitations and Suggestions | 第68-70页 |
| References | 第70-74页 |
| Appendix Ⅰ | 第74-75页 |
| Appendix Ⅱ | 第75-77页 |
| Appendix Ⅲ | 第77-78页 |
| Appendix Ⅳ | 第78-79页 |
| Appendix Ⅴ | 第79-84页 |
| Appendix Ⅵ | 第84-88页 |
| Acknowledgements | 第88页 |
