| Abstract | 第3-4页 |
| 摘要 | 第5-9页 |
| 1 Introduction | 第9-13页 |
| 1.1 Background of English Writing | 第9-10页 |
| 1.2 Purpose of the Research | 第10页 |
| 1.3 Significance of the Present Study | 第10-12页 |
| 1.4 Structure of the Thesis | 第12-13页 |
| 2 Literature Review of Mediation | 第13-25页 |
| 2.1 Theoretical Framework of Mediation | 第13-15页 |
| 2.2 Theoretical Research on Mediation | 第15-17页 |
| 2.2.1 Theoretical Research on Mediation in Abroad | 第16页 |
| 2.2.2 Theoretical Research on Mediation at Home | 第16-17页 |
| 2.3 Empirical Research on Mediation | 第17-25页 |
| 2.3.1 Research on Teacher Mediation | 第17-22页 |
| 2.3.2. Research on Peer Mediation | 第22-25页 |
| 3 Research Methodology | 第25-31页 |
| 3.1 Research Questions | 第25页 |
| 3.2 Teaching Context and Participants | 第25-26页 |
| 3.3 Data Collection | 第26-29页 |
| 3.3.1 Research Instruments | 第26-28页 |
| 3.3.1.1 Questionnaires | 第26-27页 |
| 3.3.1.2 Interviews | 第27页 |
| 3.3.1.3 Students’ Written Reflection on the English Writing Class | 第27-28页 |
| 3.3.1.4 CET-4 | 第28页 |
| 3.3.2 Research Procedure | 第28-29页 |
| 3.4 Data Analysis | 第29-30页 |
| 3.5 Ethical Consideration | 第30-31页 |
| 4 Research Results and Discussion | 第31-50页 |
| 4.1 Students’ Perception of Importance of Mediation | 第31-38页 |
| 4.1.1 Students’ Perception of Importance of Teacher Mediation | 第31-32页 |
| 4.1.2 Students’ Perception of Importance of Peer Mediation | 第32-35页 |
| 4.1.4 Influence of Students’ English Proficiency on Their Perception of Importance of Mediation | 第35-38页 |
| 4.2 Students’ Perception of Real Use of Mediation | 第38-41页 |
| 4.2.1 Students’ Perception of Real Use of Teacher Mediation | 第38-39页 |
| 4.2.2 Students’ Perception of Real Use of Peer Mediation | 第39-40页 |
| 4.2.3 Influence of Students’ English Proficiency on Their | 第40-41页 |
| 4.3 Results of Interviews and Written Reflection | 第41-43页 |
| 4.3.1 The Interview With the Teacher | 第41-42页 |
| 4.3.2 Interviews With the Students | 第42-43页 |
| 4.3.3 Results of the Students’ Written Reflection | 第43页 |
| 4.4 Discussion of Research Results | 第43-50页 |
| 4.4.1 Students’ Perception of Mediation | 第43-47页 |
| 4.4.1.1 Students’ Perception of Teacher Mediation | 第44-45页 |
| 4.4.1.2 Students’ Perception of Peer Mediation | 第45-47页 |
| 4.4.2 Students’ Different Perception of Importance of Teacher Mediation and Peer Mediation | 第47-48页 |
| 4.4.3 Influence of English Proficiency on the Students’ Perception | 第48页 |
| 4.4.4. Students’ Need of Other Task-specific Mediation in English Writing Learning | 第48-50页 |
| 5 Conclusion | 第50-55页 |
| 5.1 Major Findings of the Research | 第50-52页 |
| 5.1.1 Students’ Perception of Importance of Mediation | 第50-51页 |
| 5.1.2 Students’ Perception of Real Use of Mediation | 第51页 |
| 5.1.3 Influence of English Proficiency on the Students’ Perception | 第51-52页 |
| 5.1.4 Students’ Need of Other Task-specific Mediation in English Writing Learning | 第52页 |
| 5.2. Implications of This Research | 第52-54页 |
| 5.3 Limitations and Suggestion for Further Research | 第54-55页 |
| Bibliography | 第55-59页 |
| Appendix | 第59-64页 |
| Acknowledgements | 第64-65页 |
| 在读期间公开发表论文（著）及科研情况 | 第65页 |
