| Abstract | 第9-10页 |
| 摘要 | 第11-13页 |
| Chapter One Introduction | 第13-16页 |
| 1.1 Research background | 第13-14页 |
| 1.2 Research purpose and significance | 第14页 |
| 1.3 Thesis structure | 第14-16页 |
| Chapter Two Literature Review | 第16-27页 |
| 2.1 Studies on the breadth of vocabulary knowledge | 第16页 |
| 2.2 Definition and classification of language attrition | 第16-18页 |
| 2.3 Studies on lexical attrition | 第18-21页 |
| 2.3.1 Studies on lexical attrition abroad | 第18-20页 |
| 2.3.2 Studies on lexical attrition at home | 第20-21页 |
| 2.4 Studies on lexical learning strategy | 第21-23页 |
| 2.4.1 Definition of lexical learning strategy | 第21-22页 |
| 2.4.2 Classification of lexical learning strategies | 第22-23页 |
| 2.5 Related studies on the relationship between lexical learning strategies and lexical attrition at homeand abroad | 第23-27页 |
| Chapter Three Theoretical Basis | 第27-30页 |
| 3.1 Regression hypothesis | 第27页 |
| 3.2 Inverse hypothesis | 第27页 |
| 3.3 Critical threshold hypothesis | 第27-28页 |
| 3.4 Information processing theory | 第28页 |
| 3.5 Memory theory | 第28-29页 |
| 3.6 Semantic field theory | 第29-30页 |
| Chapter Four Research Design | 第30-34页 |
| 4.1 Research questions | 第30页 |
| 4.2 Research subjects | 第30-31页 |
| 4.3 Research instruments | 第31-32页 |
| 4.3.1 Questionnaire | 第31页 |
| 4.3.2 Test of breadth of vocabulary knowledge | 第31-32页 |
| 4.3.3 SPSS17.0for windows | 第32页 |
| 4.4 Research procedures | 第32页 |
| 4.5 Data collection and data analysis | 第32-34页 |
| Chapter Five Results and Discussion | 第34-50页 |
| 5.1 Analysis of the English lexical attrition | 第34-35页 |
| 5.2 Correlation between the lexical learning strategy and the lexical attrition degree | 第35-42页 |
| 5.2.1 Metacognitive strategy | 第35-36页 |
| 5.2.2 Cognitive strategy | 第36-41页 |
| 5.2.3 Social/Affective strategy | 第41-42页 |
| 5.3 Differences between the high attrition group and low attrition group in using strategy | 第42-50页 |
| 5.3.1 Three strategy categories | 第43-44页 |
| 5.3.2 Metaconitive strategy | 第44-46页 |
| 5.3.3 Cognitive strategy | 第46-48页 |
| 5.3.4 Social/Affective strategy | 第48-50页 |
| Chapter Six Conclusion | 第50-53页 |
| 6.1 Main findings | 第50-51页 |
| 6.1.1 Lexical attrition after six months | 第50页 |
| 6.1.2 Correlation between lexical attrition and lexical learning strategies | 第50-51页 |
| 6.1.3 The difference between high attrition group and low attrition group in using lexical learningstrategies | 第51页 |
| 6.2 Implications | 第51-52页 |
| 6.2.1 Suggestion for English lexical learning | 第51页 |
| 6.2.2 Suggestion for English lexical teaching | 第51-52页 |
| 6.3 Limitations and suggestions for the future study | 第52-53页 |
| References | 第53-56页 |
| Appendix A | 第56-59页 |
| Appendix B | 第59-70页 |
| Acknowledgements | 第70页 |
