| Acknowledgements | 第5-6页 |
| Abstract | 第6-7页 |
| 摘要 | 第8-11页 |
| Chapter 1 Introduction | 第11-15页 |
| 1.1 Background Information and Motivation | 第11-12页 |
| 1.2 Research Objectives and Significance | 第12-13页 |
| 1.3 Structure of the Thesis | 第13-15页 |
| Chapter 2 Literature Review | 第15-30页 |
| 2.1 Literature Reviews on Experimental Studies | 第15-19页 |
| 2.1.1 Definition of Research | 第15-16页 |
| 2.1.2 Significance of Research | 第16页 |
| 2.1.3 Types of Research | 第16-18页 |
| 2.1.4 Features of Experimental Study | 第18-19页 |
| 2.2 Literature Review on the Appraisal of Experimental Studies | 第19-30页 |
| Chapter 3 Methodology | 第30-35页 |
| 3.1 Research Questions | 第30页 |
| 3.2 Data Collection | 第30-31页 |
| 3.3 Data Coding | 第31-33页 |
| 3.4 Data Analysis | 第33-35页 |
| Chapter 4 Results | 第35-63页 |
| 4.1 Comparison of Research Topics in and outside China | 第35-42页 |
| 4.1.1 Comparison of Research Topics in and outside China from Three Levels | 第35-39页 |
| 4.1.2 Comparison of Research Topics in and outside China from Language Skills | 第39-42页 |
| 4.2 Comparison of Research Designs in and outside China | 第42-47页 |
| 4.3 Comparison of Research Subjects in and outside China | 第47-55页 |
| 4.3.1 Comparison of Basic Information Data in and outside China | 第47-50页 |
| 4.3.2 Comparison of Sampling Methods in and outside China | 第50-52页 |
| 4.3.3 Comparison of Sample Size in and outside China | 第52-54页 |
| 4.3.4 Comparison of the Equality of Research Subjects in and outside China | 第54-55页 |
| 4.4 Comparison of Data-collection Procedures in and outside China | 第55-60页 |
| 4.5 Comparison of Statistical Analysis of Research Results in and outside China | 第60-63页 |
| Chapter 5 Discussion | 第63-69页 |
| 5.1 Trend and Domain of Research Topics | 第63-64页 |
| 5.2 Research Designs and Methodological Quality | 第64-65页 |
| 5.3 Research Subjects and Methodological Quality | 第65-66页 |
| 5.4 Data-collection Procedures and Methodological Quality | 第66-67页 |
| 5.5 Statistical Analysis of Research Results and Methodological Quality | 第67-68页 |
| 5.6 Reasons | 第68-69页 |
| Chapter 6 Conclusion | 第69-72页 |
| 6.1 Summary of Findings and Implications | 第69-71页 |
| 6.2 Limitations and Recommendations for Future Study | 第71-72页 |
| Bibliography | 第72-77页 |
| Appendix | 第77-83页 |
| Appendix 1: 50 Experimental Studies outside China | 第77-81页 |
| Appendix 2: 50 Experimental Studies in China | 第81-83页 |
