| Acknowledgements | 第1-6页 |
| Abstract | 第6-7页 |
| 摘要 | 第7-12页 |
| Chapter one Introduction | 第12-15页 |
| ·Research background | 第12-13页 |
| ·Research objectives | 第13-14页 |
| ·Research significance | 第14页 |
| ·Layout of the thesis | 第14-15页 |
| Chapter Two Literature Review | 第15-34页 |
| ·Conceptual and operational definitions of L2 speaking proficiency | 第15-16页 |
| ·Conceptual definition of L2 speaking profciency | 第15-16页 |
| ·Operational definition of L2 speaking proficiency | 第16页 |
| ·Overview of classroom interaction | 第16-26页 |
| ·Definition of classroom interaction | 第17-18页 |
| ·Principles of classroom interaction | 第18-20页 |
| ·Patterns of classroom interaction | 第20-23页 |
| ·Role of classroom interaction in language learning | 第23-26页 |
| ·Previous researches on classroom interaction at home and abroad | 第26-29页 |
| ·Previous researches on classroom interaction abroad | 第27-28页 |
| ·Previous researches on classroom interaction at home | 第28-29页 |
| ·Previous studies on speaking proficiency at home and abroad | 第29-33页 |
| ·Previous studies on speaking proficiency abroad | 第30-31页 |
| ·Previous studies on speaking proficiency at home | 第31-33页 |
| ·Limitations in the previous researches | 第33-34页 |
| Chapter Three Theoretical Framework | 第34-40页 |
| ·Input hypothesis | 第34-35页 |
| ·Output hypothesis | 第35-37页 |
| ·Interaction hypothesis | 第37-40页 |
| Chapter Four Methodology | 第40-65页 |
| ·Research questions | 第40页 |
| ·Research participants | 第40-41页 |
| ·Research instruments | 第41-42页 |
| ·Tests | 第41页 |
| ·Classroom assessment | 第41-42页 |
| ·Field notes | 第42页 |
| ·Research procedures | 第42-55页 |
| ·Introduction of action research | 第42-45页 |
| ·Implementation of action research | 第45-55页 |
| ·Data collection | 第55-56页 |
| ·Tests | 第55页 |
| ·Classroom assessment | 第55-56页 |
| ·Field notes | 第56页 |
| ·Data analysis | 第56-65页 |
| ·Comparison between pre-test and post-test on fluency level | 第56-58页 |
| ·Comparison between pre-test and post-test on accuracy level | 第58-60页 |
| ·Comparison between pre-test and post-test on complexity level | 第60-61页 |
| ·Analysis of data from classroom assessment | 第61-63页 |
| ·Analysis of data from field notes | 第63-65页 |
| Chapter Five Results and Discussion | 第65-68页 |
| ·Results | 第65-66页 |
| ·Results from tests | 第65页 |
| ·Results from classroom assessment | 第65-66页 |
| ·Results from field notes | 第66页 |
| ·Discussion | 第66-68页 |
| ·Classroom interaction and fluency | 第66页 |
| ·Classroom interaction and accuracy | 第66-67页 |
| ·Classroom interaction and complexity | 第67-68页 |
| Chapter Six Conclusion | 第68-71页 |
| ·Findings | 第68页 |
| ·Implications for language teaching | 第68-70页 |
| ·Limitations and suggestions of the study | 第70-71页 |
| References | 第71-76页 |
| Appendix Ⅰ PETS第一级口试试卷 | 第76-80页 |
| Appendix Ⅱ PETS第二级口试试卷 | 第80-83页 |
| Appendix Ⅲ Results of pre-test | 第83-84页 |
| Appendix Ⅳ Results of post-test | 第84页 |
