大学生英语写作中的词汇丰富性发展特征研究PDF电子书下载

ChapterOne Introduction 1

1.1 Background ofthe Study 1

1.2 Rationale for the Study 5

1.3 Purpose and Method ofthe Study 8

1.4 Significance ofthe Study 10

1.5 Organization ofthe Book 13

Chapter Two Literature Review 16

2.1 Introduction 16

2.2 Definitions of Lexical Richness 17

2.3 Measures for Lexical Richness 20

2.4 Role ofVocabulary in L2 Writing 28

2.5 Developmental Features of Vocabulary in L2 Writing 29

2.6 Lexical Richness in Writings by L1 and L2 Learners 34

2.7 Lexical Richness and L2 Writing Quality 36

2.8 Lexical Features of L2 Writing 40

2.9 Research Gaps and Research Questions 49

2.10 Chapter Summary 52

Chapter Three Methodology 54

3.1 Introduction 54

3.2 Special Considerations for Research Design 55

3.3 Participants 57

3.4 Source of Data 58

3.5 Pilot Study 59

3.6 Procedures for Data Collection 60

3.7 Building the DIY Corpora 65

3.8 Data Analysis 74

3.9 Chapter Summary 84

Chapter Four Results and Findings of the Cross-sectional Study 86

4.1 Introduction 86

4.2 Features of Lexical Variation 86

4.3 Features of Lexical Density 89

4.4 Features of Lexical Sophistication 91

4.5 Features ofWord Length 94

4.6 Features of Word Frequency Distribution 97

4.7 Relationship between Lexical Richness and Overall Writing Performance 101

4.8 Chapter Summary 105

Chapter Five Results and Findings of the Longitudinal Study 106

5.1 Introduction 106

5.2 Features of Lexical Variation 106

5.3 Features of Lexical Density 109

5.4 Features of Lexical Sophistication 110

5.5 Features ofWord Length 112

5.6 Features of Word Frequency Distribution 115

5.7 Relationship between Lexical Richness and 119

Overall Writing Performance 119

5.8 Chapter Summary 122

Chapter Six Resultsand Findingsa cross the Two Corpora 123

6.1 Introduction 123

6.2 Patterns and Discrepancies in Lexical Variation 123

6.3 Patterns and Discrepancies in Lexical Density 126

6.4 Patterns and Discrepancies in Lexical Sophistication 129

6.5 Patterns and Discrepancies in Word Length 132

6.6 Pattems and Discrepanciesin Word Frequency Distribution 134

6.7 Patterns and Discrepancies in the Relationships between Lexical Richness and Overall Writing Performance 140

6.8 Chapter Summary 142

Chapter Seven Results and Findings of the Case Studies 143

7.1 Introduction 143

7.2 Results of KeynessAnalysis 143

7.3 Developmental Features of"we" 147

7.4 Developmental Features of"you" 149

7.5 Developmental Features of"l" 151

7.6 Developmental Features of"can" 152

7.7 Developmental Features of"know" 155

7.8 Developmental Features of"so" 159

7.9 Chapter Summary 165

Chapter Eight Discussion 167

8.1 Introduction 167

8.2 Overuse of High-frequency Words 168

8.3 Vocabulary Plateau Phenomenon in Lexical Variation 170

8.4 Models of Developmental Features of Lexical Richness 173

8.5 Unbalanced Effects of Lexical Richness on the Overall Writing Performance 179

8.6 The Most Overused First and Second Personal Pronouns 181

8.7 The Most Overused Modal Auxiliary 193

8.8 The Most Overused Lexical Word 196

8.9 The Most Overused Multi-function Word 202

8.10 Chapter Summary 205

Chapter Nine Conclusion 206

9.1 Summary ofthe Study 206

9.2 Pedagogical Implications 209

9.3 Limitations ofthe Study 223

9.4 Suggestions for Future Studies 224

9.5 Concluding Remarks 225

References 227

Appendix Ⅰ Prompts of WritingTask 244

Appendix Ⅱ Marking Scheme for TEM-4 and TEM-8 Compositions 245

Appendix Ⅲ Stop List 247

Appendix Ⅳ UCRELCLAWS7Tagset 257

Acknowledgements 263