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英语专业大学生写作中词汇丰富性变化历时研究

摘要第6-7页
Abstract第7-8页
List of Abbreviations第10-11页
Chapter One Introduction第11-15页
    1.1 Research Background第11页
    1.2 Problems with the Previous Studies第11-13页
    1.3 Significance of the Present Research第13-14页
    1.4 Layout of the Thesis第14-15页
Chapter Two Literature Review第15-34页
    2.1 Major Concepts and Theories第15-20页
        2.1.1 The Definition of LR第15-19页
            2.1.1.1 Measures of Lexical Variation第15-17页
            2.1.1.2 Measures of Lexical Density第17-18页
            2.1.1.3 Measures of Lexical Sophistication第18-19页
        2.1.2 The Notion of Frequency in Vocabulary Acquisition第19-20页
        2.1.3 LR and Levels of Proficiency第20页
    2.2 Previous Empirical Studies on LR第20-33页
        2.2.1 Previous Empirical Studies on LR in China第20-27页
        2.2.2 Previous Empirical Studies on LR in Foreign Countries第27-33页
    2.3 Summary第33-34页
Chapter Three Research Design第34-39页
    3.1 Research Questions第34页
    3.2 Data Collection第34-37页
        3.2.1 The Learner Corpus第34-36页
        3.2.3 The Native-speaker Corpus第36-37页
    3.3 Data Analysis第37-38页
        3.3.1 Lexical Variation第37页
        3.3.2 Lexical Density第37-38页
        3.3.3 Lexical Sophistication第38页
    3.4 Writing Tools第38-39页
Chapter Four Results and Discussion第39-57页
    4.1 Discussion on the Results of Three Dimensions of Lexical Richness for L1 and L2 Corpora第39-52页
        4.1.1 Discussion of Lexical Variation第39-43页
        4.1.2 Discussion of Lexical Density第43-46页
        4.1.3 Discussion of Lexical Sophistication第46-52页
        4.1.4 Summary第52页
    4.2 Evaluation of Writing Quality第52-53页
    4.3 Correlation between LR and Writing Quality第53-55页
        4.3.1 Correlation between LV and Writing Quality第53-54页
        4.3.2 Correlation between LD and Writing Quality第54页
        4.3.3 Correlation between LS and Writing Quality第54-55页
    4.4 Summary第55-57页
Chapter Five Conclusion第57-61页
    5.1 Major Findings第57-58页
    5.2 Pedagogical Implications第58-59页
        5.2.1 Implications for Writing and Vocabulary Teaching第58-59页
        5.2.2 Implications for Writing and Vocabulary Learning第59页
    5.3 Limitations of this Study and Suggestions for Future Studies第59-61页
References第61-64页
Appendix Ⅰ Writing Requirements and Sample Essays of L2 Learners in Each Term第64-69页
Appendix Ⅱ Sample Essays of Native Speakers第69-72页
Appendix Ⅲ Marking Criterion for TEM 4 Compositions第72-73页
Acknowledgements第73-74页
在读期间发表的学术论文及科研成果第74页

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