| Acknowledgements | 第7-8页 |
| Abstract | 第8-10页 |
| 摘要 | 第11-22页 |
| Chapter One Introduction | 第22-29页 |
| Background of the Study | 第22-25页 |
| Objective of the Present Study | 第25页 |
| Significance of the Study | 第25-26页 |
| Scope of the Study | 第26-27页 |
| Organization of the Thesis | 第27-29页 |
| Chapter Two Theoretical Background | 第29-44页 |
| Task-based Approach to Language Teaching and Learning | 第29-32页 |
| Definition of Task | 第30-31页 |
| The Characteristics of Writing | 第31页 |
| Complexity | 第31-32页 |
| The Limited Information Processing Theory | 第32-34页 |
| Skehan' Cognitive Model | 第34-37页 |
| Robinson's Cognitive Hypothesis | 第37-39页 |
| Task Complexity and Language Performance | 第39-42页 |
| Integrating this Research with these Theories | 第42页 |
| Summary | 第42-44页 |
| Chapter Three Literature Review | 第44-58页 |
| Review of Relevant Researches | 第44-55页 |
| Effects of Task Complexity on Learners' Oral Production | 第45-51页 |
| Effects of Task Complexity on Learners' Writing Production | 第51-55页 |
| Strengths and Limitations of the Previous Studies | 第55-56页 |
| Strengths of the Previous Studies | 第55页 |
| Limitations of the Previous Studies | 第55-56页 |
| Originality of the Present Study | 第56-57页 |
| Summary | 第57-58页 |
| Chapter Four Research Design | 第58-68页 |
| Research Questions and Hypotheses | 第58-60页 |
| Research Procedures | 第60-62页 |
| Experimental Design | 第62-67页 |
| Groups | 第62-64页 |
| Variables Involved in the Study | 第64-65页 |
| Experimental Sequence | 第65-66页 |
| Verification of the Hypotheses | 第66-67页 |
| Summary | 第67-68页 |
| Chapter Five Methodology | 第68-85页 |
| Pilot Study | 第68-69页 |
| Homogeneity Test | 第69-70页 |
| Participants | 第70-72页 |
| Writing Tasks | 第72-76页 |
| The Control of Intervening Variables | 第76-77页 |
| Measures | 第77-83页 |
| Measures of Accuracy | 第78-79页 |
| Measures of Complexity | 第79-82页 |
| Measures of Fluency | 第82-83页 |
| Statistical Methods | 第83-84页 |
| Summary | 第84-85页 |
| Chapter Six Result and Discussion | 第85-100页 |
| Results and Discussion of Hypothesis One | 第85-89页 |
| Results of Hypothesis One | 第85-87页 |
| Discussions of Hypothesis One | 第87-89页 |
| Results and Discussion of Hypothesis Two | 第89-94页 |
| Results of Hypothesis Two | 第89-92页 |
| Discussions of Hypothesis Two | 第92-94页 |
| Results and Discussion of Hypothesis Three | 第94-98页 |
| Results of Hypothesis Three | 第94-96页 |
| Discussions of Hypothesis Three | 第96-98页 |
| Summary | 第98-100页 |
| Chapter Seven Conclusions | 第100-105页 |
| Principle Findings | 第100-101页 |
| Implications | 第101-103页 |
| Limitations and Suggestions | 第103-104页 |
| Summary | 第104-105页 |
| References | 第105-116页 |
| Appendices | 第116-120页 |
| Appendix A Homogeneity Test | 第116-117页 |
| Appendix B The Instruction for Group 1 | 第117-118页 |
| Appendix C The Instruction for Group 2 | 第118-119页 |
| Appendix D The Instruction for Group 3 | 第119-120页 |
| Publications of the Author | 第120页 |
