| Acknowledgements | 第4-6页 |
| Abstract | 第6-7页 |
| 摘要 | 第8-13页 |
| List of Abbreviations in the Thesis | 第13-14页 |
| Chapter One Introduction | 第14-19页 |
| 1.1 Background of the Present Study | 第14-16页 |
| 1.2 Objectives and Significance of the Present Study | 第16-17页 |
| 1.3 Overview of the Thesis | 第17-19页 |
| Chapter Two Literature Review | 第19-34页 |
| 2.1 The Origins of Research on IV A | 第19-23页 |
| 2.1.1 Intentional and Incidental Vocabulary Learning | 第19-20页 |
| 2.1.2 Research on Basic Theory of IVA | 第20-21页 |
| 2.1.3 Laufer and Hulstijn's Involvement Load Hypothesis | 第21-23页 |
| 2.2 Research on IVA Influence Factors | 第23-26页 |
| 2.2.1 Learner Factors and IVA | 第23-25页 |
| 2.2.2 Discourse Factors and IVA | 第25-26页 |
| 2.3 Research on IVA in the Process of Reading | 第26-27页 |
| 2.3.1 Input Enhancement in the IVA Process | 第26页 |
| 2.3.2 Reading Plus in the IVA Process | 第26-27页 |
| 2.4 Research on IVA in the Process of Listening | 第27-32页 |
| 2.4.1 The Possibility of IVA in Listening Process | 第28-29页 |
| 2.4.2 ILH and IVA in Listening Process | 第29-30页 |
| 2.4.3 Incidental Acquisition of Receptive and Productive Vocabulary | 第30-32页 |
| 2.5 The Defects of the Previous Studies | 第32-34页 |
| Chapter Three Research Methodology | 第34-42页 |
| 3.1 Research Questions | 第34页 |
| 3.2 Participants | 第34-35页 |
| 3.3 Materials | 第35-39页 |
| 3.3.1 Listening Materials and Target Words | 第35-36页 |
| 3.3.2 Listening Tasks Design | 第36-37页 |
| 3.3.3 Vocabulary Tests, Questionnaire and Interview | 第37-39页 |
| 3.4 Data Collection | 第39-40页 |
| 3.5 Data Analysis | 第40-42页 |
| Chapter Four Results and Discussion | 第42-57页 |
| 4.1 Data Analysis | 第42-52页 |
| 4.1.1 Receptive and Productive Word Acquisition Effects | 第42-46页 |
| 4.1.2 The Relationship between Involvement Load Size and Instant/Delayed Vocabulary Acquisition Effects | 第46-49页 |
| 4.1.3 Learners' Attitudes Showed in the Questionnaire | 第49-52页 |
| 4.2 Results Discussion | 第52-57页 |
| 4.2.1 Receptive and Productive Word Acquisition Effects' Difference | 第52-53页 |
| 4.2.2 Confirmation of ILH in the Listening Process | 第53-54页 |
| 4.2.3 Learners' Attitudes to IVA in the Listening Process | 第54-57页 |
| Chapter Five Conclusion | 第57-62页 |
| 5.1 Research Fruits | 第57-58页 |
| 5.2 Pedagogical Implications | 第58-60页 |
| 5.3 Limitations and Suggestions for Future Research | 第60-62页 |
| References | 第62-67页 |
| Appendices | 第67-75页 |
| 攻读硕士学位期间的研究成果 | 第75页 |
