| 摘要 | 第5-6页 |
| Abstract | 第6-7页 |
| Abbreviations | 第10-13页 |
| Chapter 1 Introduction | 第13-17页 |
| 1.1 Research background | 第13-14页 |
| 1.2 Significance | 第14-15页 |
| 1.3 Outline of the study | 第15-17页 |
| Chapter 2 Literature Review | 第17-29页 |
| 2.1 Previous studies of SCMC at home and abroad | 第17-22页 |
| 2.1.1 Positive roles of SCMC on learners’ external performance | 第17-18页 |
| 2.1.2 The effects of SCMC on learners’ internal performance | 第18-20页 |
| 2.1.3 Studies about the factors which influenced the effects of SCMC | 第20-22页 |
| 2.2 Previous studies of effects of proficiency difference on collaborative work | 第22-25页 |
| 2.3 Previous studies of language errors | 第25-27页 |
| 2.4 Summary | 第27-29页 |
| Chapter 3 Methodology | 第29-45页 |
| 3.1 Theoretical foundations | 第29-34页 |
| 3.1.1 Krashen’s SLA theory | 第29-30页 |
| 3.1.2 Output hypothesis | 第30-32页 |
| 3.1.3 Interaction hypothesis | 第32页 |
| 3.1.4 Sociocultural theory | 第32-34页 |
| 3.2 Research design | 第34-43页 |
| 3.2.1 Research questions | 第34页 |
| 3.2.2 Participants | 第34-35页 |
| 3.2.3 Research methods | 第35-37页 |
| 3.2.4 Research procedures | 第37-39页 |
| 3.2.5 Data collection and analysis | 第39-42页 |
| 3.2.6 Examples of different degree errors in this study | 第42-43页 |
| 3.3 Summary | 第43-45页 |
| Chapter 4 Results and Discussion | 第45-71页 |
| 4.1 Results of students’ interaction | 第45-56页 |
| 4.1.1 The difference among different groups | 第45-50页 |
| 4.1.2 The variation trend of different groups | 第50-56页 |
| 4.2 Results of students’ performance in pretest and post-test | 第56-58页 |
| 4.2.1 Comparison of the number of errors in tests among different groups | 第56-57页 |
| 4.2.2 Comparison of students’ the number of errors in tests | 第57-58页 |
| 4.2.3 Comparison of students with different proficiency in tests scores | 第58页 |
| 4.3 Results of students’ interview | 第58-60页 |
| 4.4 Discussion | 第60-69页 |
| 4.4.1 Reasons of difference among groups on the number of errors | 第60-62页 |
| 4.4.2 Reasons of variation trends of different groups on the number of errors | 第62-67页 |
| 4.4.3 Reasons of students’ performance in pretest and post-test | 第67-69页 |
| 4.5 Summary | 第69-71页 |
| Chapter 5 Conclusion | 第71-75页 |
| 5.1 Major findings | 第71-72页 |
| 5.2 Pedagogical implications | 第72-73页 |
| 5.3 Research limitations and suggestions for future studies | 第73-75页 |
| References | 第75-83页 |
| Appendix Ⅰ Requirements | 第83-85页 |
| Appendix Ⅱ Pretest Paper | 第85-93页 |
| Appendix Ⅲ Post-test Paper | 第93-101页 |
| Appendix Ⅳ Excerpts of Students’ Discussion | 第101-121页 |
| Acknowledgements | 第121页 |
