| Acknowledgements | 第1-5页 |
| Abstract | 第5-7页 |
| 摘 要 | 第7-11页 |
| Introduction | 第11-15页 |
| 1 Theoretical Background | 第15-33页 |
| ·Definitions of cohesion and cohesive devices | 第15-25页 |
| ·Previous studies on cohesion in writing | 第25-31页 |
| ·Summary and the hypotheses for the study | 第31-33页 |
| 2 Methodology | 第33-37页 |
| ·Research design | 第33-36页 |
| ·Summary | 第36-37页 |
| 3 Results | 第37-59页 |
| ·Results about the effect of grade level on frequencies of cohesive devices per T-unit | 第37-53页 |
| ·Results about the effect of writing topic on frequencies of cohesive devices per T-unit | 第53-54页 |
| ·Results about the relationship between the frequencies of cohesive devices per T-unit and writing scores | 第54-57页 |
| ·Summary | 第57-59页 |
| 4 Discussion | 第59-69页 |
| ·Developmental trends in the use of cohesive devices across grade levels | 第59-65页 |
| ·Differences in the use of cohesive devices across writing topics | 第65-67页 |
| ·Relationship between the use of cohesive devices and writing quality | 第67-68页 |
| ·Summary | 第68-69页 |
| Conclusion | 第69-73页 |
| Bibliography | 第73-78页 |
| Appendix ⅠPublished papers during study of MA | 第78-79页 |
| Appendix ⅡGuidelines for T-units | 第79-81页 |
| Appendix Ⅲ Criteria for identifying cohesive devices | 第81-84页 |
| Appendix Ⅳ Scoring criteria | 第84-85页 |
