| ACKNOWLEDGEMENTS | 第1-6页 |
| ABSTRACT | 第6-9页 |
| 中文摘要 | 第9-11页 |
| Table of Contents | 第11-14页 |
| List of Tables and Figures | 第14-15页 |
| Chapter One INTRODUCTION | 第15-19页 |
| ·Background of the study | 第15-16页 |
| ·Aims of the study | 第16-17页 |
| ·Organization of the study | 第17-19页 |
| Chapter Two LITERATURE REVIEW | 第19-30页 |
| ·The nature of L2 vocabulary acquisition | 第19-20页 |
| ·The input-output hypothesis and L2 vocabulary acquisition | 第20-21页 |
| ·The involvement load hypothesis and L2 vocabulary acquisition | 第21-24页 |
| ·Empirical studies on task effects on L2 vocabulary acquisition | 第24-28页 |
| ·Earlier studies on task effects on L2 vocabulary acquisition | 第24-25页 |
| ·Hulstijn and Laufer’s (2001) study as a seminal study of L2 vocabulary acquisition | 第25-26页 |
| ·Improved designs to investigate task effects on L2 vocabulary acquisition | 第26-28页 |
| ·Limitations in the previous studies on task effects on L2 vocabulary acquisition | 第28-30页 |
| Chapter Three METHOD | 第30-42页 |
| ·Research questions | 第30-31页 |
| ·Experimental design | 第31-33页 |
| ·Subjects | 第33-34页 |
| ·Target words | 第34-36页 |
| ·Design of reading-related L2 vocabulary acquisition tasks | 第36-37页 |
| ·Testing L2 vocabulary acquisition | 第37-39页 |
| ·Implementation of test of L2 vocabulary size, reading-related L2 vocabulary acquisition tasks and tests of L2 vocabulary acquisition | 第39-40页 |
| ·Scoring for the tests of L2 vocabulary acquisition | 第40-41页 |
| ·Interrater reliability | 第41-42页 |
| Chapter Four RESULTS and DISCUSSIONS | 第42-60页 |
| ·Results | 第42-52页 |
| ·Effects of task type and involvement load on L2 vocabulary acquisition on the immediate test | 第42-47页 |
| ·Descriptive statistics for the immediate test | 第42-45页 |
| ·A MANOVA for the immediate test | 第45-47页 |
| ·Effects of task type and involvement load on L2 vocabulary acquisition on the delayed test | 第47-52页 |
| ·Descriptive statistics for the delayed test | 第47-51页 |
| ·A MANOVA for the delayed test | 第51-52页 |
| ·Discussions | 第52-60页 |
| ·A significant effect of task type on the acquisition of L2 receptive vocabulary knowledge only | 第53-55页 |
| ·No significant effect of involvement load on the acquisition of L2 vocabulary knowledge | 第55-58页 |
| ·No significant interaction between task type and involvement load on the acquisition of L2 vocabulary knowledge | 第58-60页 |
| Chapter Five CONCLUSIONS | 第60-64页 |
| ·Major findings | 第60-61页 |
| ·Implications | 第61-62页 |
| ·Theoretical implications | 第61页 |
| ·Pedagogical implications | 第61-62页 |
| ·Limitations and suggestions | 第62-64页 |
| REFERENCES | 第64-69页 |
| Appendix I Test of L2 Vocabulary Size | 第69-72页 |
| Appendix II L2 Vocabulary Acquisition Tasks | 第72-85页 |
| Appendix III The Immediate Test of L2 Vocabulary Acquisition | 第85-88页 |
