文摘
英文文摘
论文说明:List of Tables
Acknowledgements
Chapter One Introduction
1.1 Overview
1.2 Need for the present study
1.3 Structure of the thesis
Chapter Two Literature Review
2.1 Basic concepts
2.1.1 Studies on definition of a word
2.1.2 Receptive vs. productive vocabulary
2.1.3 Some measures of lexical richness
2.2 Related theories
2.2.1 Separate trait models
2.2.2 Global trait models
2.3 Related empirical studies
2.4 Summary
Chapter Three Methodology
3.1 Research questions
3.2 Research design
3.2.1 Material
3.2.2 Corpus description
3.2.3 A description of TEM-Band 4 and TEM-Band 8 oral test
3.2.4 Task 2 in TEM-Band 4 and task 3 in TEM-Band 8 oral test
3.3 Data processing
3.3.1 Data collecting
3.3.2 Data clarifying
3.3.3 Data analyzing
3.4 Tools for data processing
3.5 Summary
Chapter Four Results and Discussion
4.1 Differences in lexical variation
4.1.1 Differences in lexical variation of learners between Year Two and Year Four
4.1.2 Differences in lexical variation of high-level learners of Year Two and Year Four
4.1.3 Differences in lexical variation of low-level learners of Year Two and Year Four
4.2 Differences in lexical sophistication
4.2.1 Differences in lexical sophistication of learners between Year Two and Year Four
4.2.2 Differences in lexical sophistication of high-level learners between Year Two and Year Four
4.2.3 Differences in lexical sophistication of low-level learners between Year Two and Year Four
4.3 Summary
Chapter Five Conclusion
5.1 Major findings
5.2 Pedagogical implications
5.3 Limitations
5.4 Recommendations for future research
References
Appendix
