| Acknowledgements | 第4-5页 |
| Abstract | 第5-6页 |
| 摘要 | 第7-12页 |
| Chapter One Introduction | 第12-15页 |
| 1.1 Research Background | 第12-13页 |
| 1.2 Purpose and Significance of the Research | 第13-14页 |
| 1.3 Structure of the Thesis | 第14-15页 |
| Chapter Two Literature Review | 第15-27页 |
| 2.1 Zone of Proximal Development | 第15-17页 |
| 2.1.1 The Origin of ZPD | 第15-16页 |
| 2.1.2. Definition of ZPD | 第16-17页 |
| 2.2 Dynamic Assessment | 第17-23页 |
| 2.2.1 Definitions of Dynamic Assessment | 第17-18页 |
| 2.2.2 Empirical Studies on Interventionist and Interactionist DA Approaches | 第18-21页 |
| 2.2.2.1 Empirical Studies on Interventionist DA Approach | 第18-20页 |
| 2.2.2.2 Empirical Studies on Interactionist DA Approach | 第20-21页 |
| 2.2.3 Empirical Studies on DA in L2 Classroom | 第21-23页 |
| 2.3 Empirical Studies on Group DA and Peer DA | 第23-26页 |
| 2.3.1 Empirical Studies on Group DA | 第23-24页 |
| 2.3.2 Empirical Studies on Peer DA | 第24-26页 |
| 2.4 Comments on the Previous Research | 第26-27页 |
| Chapter Three Research Methodology | 第27-35页 |
| 3.1 Research Questions | 第27页 |
| 3.2 Participants | 第27-28页 |
| 3.3 Instruments | 第28-33页 |
| 3.4 Data Collection and Analysis | 第33-35页 |
| Chapter Four Result and Discussion | 第35-53页 |
| 4.1 Peer Mediational Topics during DA Sessions | 第35-38页 |
| 4.2 Peer Mediational Strategies during DA Sessions | 第38-47页 |
| 4.2.1 Category of Peer Mediational Strategies | 第39-43页 |
| 4.2.2 Variation of Frequency and Explicitness of Peer Mediational Strategies | 第43-47页 |
| 4.3 Effect of DA-based Peer Mediation on Students' Writing Performance | 第47-53页 |
| 4.3.1 Evaluation of Students' Writing Performance before and after the DA Sessions | 第47-50页 |
| 4.3.2 Interpretation of Students' Writing Performance before and after the DA Sessions | 第50-53页 |
| Chapter Five Conclusion | 第53-56页 |
| 5.1 Major Findings | 第53-54页 |
| 5.2 Implications | 第54-55页 |
| 5.3 Limitations and Suggestions for Future Research | 第55-56页 |
| References | 第56-61页 |
| Appendix Ⅰ Questionnaire on the Current Situation of L2 Writing Instruction . | 第61-64页 |
| Appendix Ⅱ Proficiency Test | 第64-74页 |
| Appendix Ⅲ Writing Tasks | 第74页 |
