| Acknowledgements | 第1-6页 |
| Abstract | 第6-9页 |
| 中文摘要 | 第9-15页 |
| List of Tables | 第15-16页 |
| List of Figures | 第16-17页 |
| Chapter One INTRODUCTION | 第17-22页 |
| ·Research Background | 第17-19页 |
| ·Significance of the study | 第19-20页 |
| ·Theoretical Significance | 第19页 |
| ·Practical Significance | 第19-20页 |
| ·Purpose of the Study | 第20-21页 |
| ·Outline of the Thesis | 第21-22页 |
| Chapter Two LITERATURE REVIEW | 第22-39页 |
| ·Learning Vocabulary through Extensive Reading | 第22-24页 |
| ·Factors Influencing L2 Incidental Vocabulary Learning Through Reading | 第24-37页 |
| ·Involvement Load | 第25-30页 |
| ·The Involvement Load Hypothesis | 第25-27页 |
| ·Empirical Studies on the Involvement Load Hypothesis | 第27-30页 |
| ·Working Memory | 第30-33页 |
| ·Definition of Working Memory | 第30-31页 |
| ·The Relationship Between Involvement Load and Working Memory | 第31-32页 |
| ·Previous Studies on the Relationship Between Working Memory and Vocabulary Learning | 第32-33页 |
| ·Vocabulary Knowledge | 第33-37页 |
| ·The Definition of Vocabulary Knowledge | 第33-35页 |
| ·The Relationship Between Involvement Load and Vocabulary Knowledge | 第35-36页 |
| ·Previous Studies on the Relationship Between Vocabulary Knowledge and Vocabulary Learning | 第36-37页 |
| ·Problems in the Previous Studies | 第37-39页 |
| Chapter Three METHODOLOGY | 第39-49页 |
| ·Research Questions | 第39-40页 |
| ·Research Design | 第40-47页 |
| ·Participants | 第40-42页 |
| ·Instruments | 第42-45页 |
| ·Reading Material and Tasks | 第42-43页 |
| ·Working Memory Capacity Measurement | 第43-44页 |
| ·Vocabulary Knowledge Test | 第44页 |
| ·Posttests | 第44-45页 |
| ·Interview | 第45页 |
| ·Reliability Test | 第45-46页 |
| ·Procedure of Data Collection | 第46-47页 |
| ·Operationalizing Variables | 第47-49页 |
| ·Involvement Load | 第47页 |
| ·Working Memory Capacity | 第47-48页 |
| ·Vocabulary Knowledge | 第48页 |
| ·Dependent Variables | 第48-49页 |
| Chapter Four RESULTS AND DISCUSSION | 第49-62页 |
| ·Results | 第49-56页 |
| ·Descriptive Statistics of Posttests | 第49-50页 |
| ·One-way ANOVA of Posttests | 第50-51页 |
| ·Regression Analysis for Posttests | 第51-56页 |
| ·Discussion | 第56-62页 |
| ·The Effect of Involvement Load on Incidental Vocabulary Acquisition | 第56-58页 |
| ·Effect of Working Memory and Vocabulary Knowledge on Incidental Vocabulary Acquisition Under the Conditions of Different Involvement Load | 第58-62页 |
| Chapter Five CONCLUSIONS AND IMPLICATIONS | 第62-67页 |
| ·Major Findings | 第62-63页 |
| ·Theoretical implications | 第63-64页 |
| ·Pedagogical Implications | 第64-66页 |
| ·Limitations of the Present Study | 第66-67页 |
| References | 第67-72页 |
