| Abstract | 第3-4页 |
| 摘要 | 第5-9页 |
| Chapter One Introduction | 第9-12页 |
| 1.1 Research background | 第9-10页 |
| 1.2 Significance of the present research | 第10-11页 |
| 1.2.1 Theoretical significance | 第10页 |
| 1.2.2 Practical significance | 第10-11页 |
| 1.3 Structure of present research | 第11-12页 |
| Chapter Two Literature review | 第12-24页 |
| 2.1 Relevant terms in this research | 第12-15页 |
| 2.1.1 Writing prompts | 第12-13页 |
| 2.1.2 Prompt categories | 第13-14页 |
| 2.1.3 Text features | 第14-15页 |
| 2.2 Writing prompts in high-stakes tests | 第15-19页 |
| 2.2.1 Writing prompts in National Matriculation English Test | 第15-16页 |
| 2.2.2 Writing prompts in College English Tests | 第16-18页 |
| 2.2.3 Writing prompts in Tests for English Majors | 第18-19页 |
| 2.3 Theoretical basis for the present study | 第19-20页 |
| 2.4 Previous research findings abroad | 第20-22页 |
| 2.4.1 Prompt characteristics and writing performance | 第20-22页 |
| 2.4.2 Prompt characteristics and text complexity | 第22页 |
| 2.5 Previous research findings at home | 第22-24页 |
| Chapter Three Research methodology | 第24-34页 |
| 3.1 Research questions | 第24页 |
| 3.2 Research participants | 第24-25页 |
| 3.3 Research instruments and procedures | 第25-28页 |
| 3.3.1 Corpus for analysis | 第25页 |
| 3.3.2 Writing prompts in the present study | 第25-28页 |
| 3.4 Tools for Data Analysis | 第28-30页 |
| 3.4.1 Coh-Metrix 3.0 | 第28-29页 |
| 3.4.2 SPSS 16.0 | 第29-30页 |
| 3.5 Data analysis and text features | 第30-34页 |
| 3.5.1 Rating scales of writing performance | 第30页 |
| 3.5.2 Text features | 第30-34页 |
| Chapter Four Results and discussion | 第34-48页 |
| 4.1 Learners' different writing performance | 第34-36页 |
| 4.2 Different text features among writing prompts | 第36-41页 |
| 4.2.1 Differences in descriptive figures | 第36-37页 |
| 4.2.2 Differences in lexical diversity | 第37页 |
| 4.2.3 Differences in referential cohesion | 第37-38页 |
| 4.2.4 Differences in connectives | 第38-39页 |
| 4.2.5 Differences in syntactic complexity | 第39-40页 |
| 4.2.6 Differences in readability | 第40-41页 |
| 4.3 Predicative powers of learners' writing performance | 第41-44页 |
| 4.3.1 Influential textual features for writing task one | 第41-42页 |
| 4.3.2 Influential textual features for writing task two | 第42页 |
| 4.3.3 Influential textual features for writing task three | 第42-43页 |
| 4.3.4 Influential textual features for writing task four | 第43-44页 |
| 4.4 Discussion | 第44-48页 |
| 4.4.1 Writing prompts and writing performance | 第44-45页 |
| 4.4.2 Writing prompts and text features | 第45-47页 |
| 4.4.3 The influential factors of writing performance | 第47-48页 |
| Chapter Five Conclusion | 第48-53页 |
| 5.1 Major findings | 第48-51页 |
| 5.1.1 Different writing performance | 第48-49页 |
| 5.1.2 Different textual features | 第49-50页 |
| 5.1.3 Influencing factors of learners' writing performance | 第50-51页 |
| 5.2 Implications for language teaching and language testing | 第51-52页 |
| 5.2.1 Suggestions for prompt design in National Matriculation | 第51页 |
| 5.2.2 Implications for test designers in high-stakes tests | 第51页 |
| 5.2.3 Implications for language teaching and learning | 第51-52页 |
| 5.3 Limitations and further research | 第52-53页 |
| References | 第53-57页 |
| Appendix Ⅰ Writing prompts for simulated writing | 第57-59页 |
| Appendix Ⅱ The scoring scales of writing tests | 第59-60页 |
| Appendix Ⅲ Coh-Metrix 3.0 Windows | 第60-61页 |
| Appendix Ⅳ Coh-Metrix 3.0 Indices | 第61-64页 |
| Appendix Ⅴ Examples of writing prompts in high-stakes tests | 第64-67页 |
| Acknowledgements | 第67-68页 |
| 在校期间公开发表的论文（著）及科研情况 | 第68页 |
