| Abstract | 第1-6页 |
| 摘要 | 第6-11页 |
| Tables | 第11-13页 |
| Chapter 1 Introduction | 第13-17页 |
| ·The Issue of text difficulty of EFL reading materials | 第13-14页 |
| ·Need for the study | 第14-15页 |
| ·General description of the study | 第15-16页 |
| ·Organization of the thesis | 第16-17页 |
| Chapter 2 Literature Review | 第17-35页 |
| ·The role of EFL reading materials in China | 第17-18页 |
| ·Selecting EFL reading materials | 第18-20页 |
| ·Measuring text difficulty | 第20-28页 |
| ·Readability formulas | 第20-23页 |
| ·Comments on readability formulas | 第23-26页 |
| ·Cloze test | 第26-28页 |
| ·Measuring difficulty of EFL reading materials | 第28-29页 |
| ·The present study | 第29-32页 |
| ·Extracting more linguistic features | 第30-32页 |
| ·Linguistic features | 第32页 |
| ·Research questions and variables | 第32-35页 |
| Chapter 3 Methodology | 第35-55页 |
| ·EFL reading materials | 第35-36页 |
| ·Collecting text difficulty data | 第36-41页 |
| ·Reader participants | 第36-38页 |
| ·Scoring scheme | 第38-39页 |
| ·Scoring table design | 第39-40页 |
| ·Collecting readers' scoring data of texts | 第40-41页 |
| ·Collecting measurement data of linguistic features | 第41-55页 |
| ·Computer tools | 第41-46页 |
| ·Coh-Metrix 2.0 | 第41-45页 |
| ·CLAWS POS Tagger | 第45页 |
| ·WordSmith Tools 4.0 | 第45页 |
| ·Range32 | 第45-46页 |
| ·Other tools | 第46页 |
| ·Steps of collecting measurement data of linguistic features | 第46-54页 |
| ·Text cleaning | 第46-47页 |
| ·Framework for linguistic feature data collection | 第47页 |
| ·Linguistic feature data from Coh-Metrix 2.0 | 第47-49页 |
| ·Linguistic feature data from WordSmith Tools 4.0 | 第49-52页 |
| ·Linguistic feature data from Range32 | 第52-54页 |
| ·Summary of collecting measurement data of linguistic features | 第54-55页 |
| Chapter 4 Data Analyses and Discussion | 第55-75页 |
| ·Ensuring the reliability of the teachers' rating scores | 第55-58页 |
| ·The sequencing of the texts in the textbook | 第58-59页 |
| ·Finding potential predictors | 第59-66页 |
| ·Correlation analyses between text difficulty and linguistic features | 第59-61页 |
| ·General discussions on the correlated linguistic features | 第61-63页 |
| ·Grouping of the correlated linguistic features | 第63-64页 |
| ·Discussions on the less relevant linguistic features | 第64-66页 |
| ·Developing a measuring model | 第66-75页 |
| ·Factors influencing regression models | 第67-68页 |
| ·Developing a measuring model with regression analyses | 第68-72页 |
| ·Analysis of the model | 第72-75页 |
| Chapter 5 Conclusion | 第75-79页 |
| ·Major findings | 第75-76页 |
| ·Implications | 第76-77页 |
| ·Limitations and suggestions for future work | 第77-79页 |
| Bibliography | 第79-87页 |
| Appendix 1 教师打分表 | 第87-89页 |
| Appendix 2 58 Searching Algorithms | 第89-92页 |
| Appendix 3 Correlation between 91 Linguistic | 第92-95页 |
| Acknowledgements | 第95-97页 |
