| Acknowledgements | 第1-6页 |
| Abstract | 第6-9页 |
| 中文摘要 | 第9-11页 |
| CONTENTS | 第11-14页 |
| Chapter One INTRODUCTION | 第14-20页 |
| ·Background of the Study | 第14-16页 |
| ·Significance of the Study | 第16-18页 |
| ·Theoretical Significance | 第16页 |
| ·Methodological Significance | 第16-17页 |
| ·Practical Significance | 第17-18页 |
| ·Purpose of the Study | 第18页 |
| ·Structure of the Thesis | 第18-20页 |
| Chapter Two LITERATURE REVIEW | 第20-34页 |
| ·Lexical Richness | 第20-21页 |
| ·Definition of Lexical Richness | 第20-21页 |
| ·Classification of Lexical Richness | 第21页 |
| ·Measures of Lexical Richness | 第21-28页 |
| ·Units of Measurement | 第21-23页 |
| ·Measures of Lexical Richness in Early Years | 第23-25页 |
| ·Recent Research on Measures of Lexical Sophistication | 第25-28页 |
| ·Validating Measures of Lexical Sophistication | 第28-32页 |
| ·Reliability and Validity | 第29-30页 |
| ·Empirical Studies of Measures of Lexical Sophistication | 第30-32页 |
| ·A Summary of the Three Measures of Lexical Sophistication | 第32-34页 |
| Chapter Three METHODOLOGY | 第34-47页 |
| ·Research Questions | 第34页 |
| ·Research Design | 第34-35页 |
| ·Operational Definition of Lexical Sophistication | 第35-37页 |
| ·Three Measures of Measuring Lexical Sophistication | 第37-40页 |
| ·Lexical Frequency Profile | 第37-38页 |
| ·Lambda | 第38-39页 |
| ·Advanced D | 第39-40页 |
| ·Data Collection | 第40-45页 |
| ·Data for Testing Reliability | 第40-41页 |
| ·Data for Testing Construct Validity | 第41-44页 |
| ·Data for Testing Concurrent Validity | 第44-45页 |
| ·Data Processing | 第45-46页 |
| ·Data Analysis | 第46-47页 |
| Chapter Four RESULTS AND DISCUSSION | 第47-68页 |
| ·Results | 第47-61页 |
| ·Reliability of the Three Measures | 第47-49页 |
| ·Construct Validity of the Three Measures | 第49-59页 |
| ·Effect of Text Length on Lexical Sophistication Measures | 第49-53页 |
| ·Effect of the Variety of Advanced Words on Lexical Sophistication Measures | 第53-59页 |
| ·Concurrent Validity of the Three Measures | 第59-61页 |
| ·Discussion | 第61-68页 |
| ·No Differences in Reliability among the Three Measures | 第61-62页 |
| ·Differences in Construct Validity among the Three Measures | 第62-65页 |
| ·Effect of Text Length on the Three Measures | 第62-64页 |
| ·Effect of the Variety of Advanced Types on the Three Measures | 第64-65页 |
| ·Differences in Concurrent Validity among the Three Measures | 第65-68页 |
| Chapter Five CONCLUSIONS AND IMPLICATIONS | 第68-74页 |
| ·Major Findings | 第68-69页 |
| ·Implications | 第69-71页 |
| ·Theoretical Implications | 第69-70页 |
| ·Methodological Implications | 第70-71页 |
| ·Pedagogical Implications | 第71页 |
| ·Limitations and Suggestions | 第71-74页 |
| References | 第74-79页 |
