摘要 | 第5-7页 |
Abstract | 第7-8页 |
CHAPTER ONE INTRODUCTION | 第12-16页 |
1.1 Research Background | 第12-13页 |
1.2 Problems with Previous Studies | 第13-14页 |
1.3 Purposes and Significance of the Present Study | 第14-16页 |
CHAPTER TWO THEORETICAL BACKGROUND | 第16-27页 |
2.1 Basic Terms | 第16-17页 |
2.1.1 Lexical Richness | 第16页 |
2.1.2 Token | 第16-17页 |
2.1.3 Type | 第17页 |
2.1.4 Lexeme | 第17页 |
2.1.5 Word Family | 第17页 |
2.2 Theoretical Frameworks | 第17-22页 |
2.2.1 Laufer’s Framework | 第18-19页 |
2.2.2 Engber’s Framework | 第19-21页 |
2.2.3 Read’s Framework | 第21-22页 |
2.3 Debate on Theoretical Frameworks | 第22-27页 |
2.3.1 Lexical Variation | 第22-23页 |
2.3.2 Lexical Sophistication | 第23-25页 |
2.3.3 Lexical Density | 第25-27页 |
CHAPTER THREE LITERATURE REVIEW | 第27-36页 |
3.1 Developmental Features of Lexical Richness in L2 Writings | 第27-31页 |
3.2 Relationship between Lexical Richness and Quality of L2 Writings | 第31-36页 |
CHAPTER FOUR METHODOLOGY | 第36-47页 |
4.1 Research Questions | 第36页 |
4.2 Subjects | 第36-37页 |
4.3 Data Sources | 第37页 |
4.4 The Pilot Study | 第37-38页 |
4.5 Procedures of Data Collection | 第38-44页 |
4.5.1 Chinese EFL Learners’ Essay Corpus | 第38-43页 |
4.5.1.1 Collecting L2 Writings | 第38-39页 |
4.5.1.2 Rating L2 Writings | 第39-40页 |
4.5.1.3 Grouping and Sampling L2 Writings | 第40-41页 |
4.5.1.4 Building the Chinese EFL Learners’ Essay Corpus | 第41-43页 |
4.5.2 American ENL Students’ Essay Corpus | 第43-44页 |
4.6 Lexical Richness Variables | 第44-45页 |
4.7 Data Analysis | 第45-47页 |
CHAPTER FIVE RESULTS AND DISCUSSIONS | 第47-72页 |
5.1 Results of Lexical Richness | 第47-57页 |
5.1.1 Results of Lexical Variation | 第47-51页 |
5.1.2 Results of Lexical Sophistication | 第51-54页 |
5.1.3 Results of Lexical Density | 第54-57页 |
5.1.4 Summary | 第57页 |
5.2 Results of Relationship between Lexical Richness and Writing Quality | 第57-62页 |
5.2.1 Relationship between Lexical Variation and Writing Quality | 第57-58页 |
5.2.2 Relationship between Lexical Sophistication and Writing Quality | 第58-59页 |
5.2.3 Relationship between Lexical Density and Writing Quality | 第59页 |
5.2.4 The Explanatory Power of Lexical Richness to Writing Quality | 第59-61页 |
5.2.5 Summary | 第61-62页 |
5.3 Discussion | 第62-72页 |
5.3.1 Discussion on the Results of Lexical Richness within L2 Groups and between L1 and L2 Groups | 第62-67页 |
5.3.1.1 Discussion on the Results of Lexical Variation within L2 Groups and between L1 and L2 Groups | 第62-65页 |
5.3.1.2 Discussion on the Results of Lexical Sophistication within L2 Groups and between L1 and L2 Groups | 第65-66页 |
5.3.1.3 Discussion on the Results of Lexical Density within L2 Groups and between L1 and L2 Groups | 第66-67页 |
5.3.2 Discussion on the Results of Relationship between Lexical Richness and Writing Quality | 第67-72页 |
CHAPTER SIX CONCLUSIONS | 第72-79页 |
6.1 Major Findings of the Study | 第72-73页 |
6.2 Implications of the Study | 第73-76页 |
6.3 Limitations of the Study and Suggestions for Future Research | 第76-79页 |
6.3.1 Limitations of the Study | 第76-78页 |
6.3.2 Suggestions for Future Research | 第78-79页 |
BIBLIOGRAPHY | 第79-85页 |
ACKNOWLEDGEMENTS | 第85-86页 |
APPENDICES | 第86-96页 |
Appendix A | 第86-88页 |
Appendix B | 第88-89页 |
Appendix C | 第89-91页 |
Appendix D | 第91-96页 |
PAPER(S) PUBLISHED DURING MA STUDIES | 第96页 |