| ABSTRACT | 第3-4页 |
| 摘要 | 第5-9页 |
| Chapter One Introduction | 第9-13页 |
| 1.1 Research Background | 第9-10页 |
| 1.2 Significance of the Study | 第10-11页 |
| 1.3 Organization of the Thesis | 第11-13页 |
| Chapter Two Literature Review of Aptitude | 第13-33页 |
| 2.1 Carroll's Model of Aptitude | 第14-20页 |
| 2.1.1 Carroll's Definition of the Aptitude | 第14-15页 |
| 2.1.2 The Components of the Aptitude | 第15-16页 |
| 2.1.3 Further Discussion on Carroll's Aptitude Model | 第16-19页 |
| 2.1.4 Carroll's Predictions for the Future Aptitude Study | 第19-20页 |
| 2.2 Skehan's "Processing Stage" Model of Aptitude | 第20-24页 |
| 2.3 Robinson's Aptitude Complex/Ability Differentiation Theory | 第24-26页 |
| 2.4 Other Aptitude Models | 第26-29页 |
| 2.4.1 Other Early Research in Aptitude Model | 第26-27页 |
| 2.4.2 Other Present Aptitude Research | 第27-29页 |
| 2.5 Related Studies in Aptitude | 第29-33页 |
| Chapter Three Theoretic Framework | 第33-47页 |
| 3.1 Task Complexity | 第33-39页 |
| 3.1.1 Definition of Task Complexity | 第33-36页 |
| 3.1.2 Measurements for Task Complexity | 第36-39页 |
| 3.2 Two Attentional Allocation Models | 第39-41页 |
| 3.2.1 Limited Attentional Capacity Model | 第39-40页 |
| 3.2.2 Cognition Hypothesis | 第40-41页 |
| 3.3 The Relationship between Aptitude and Task Complexity | 第41-42页 |
| 3.4 Related Studies on Task Complexity | 第42-47页 |
| 3.4.1 Studies Abroad | 第43-44页 |
| 3.4.2 Studies in China | 第44-47页 |
| Chapter Four Methodology | 第47-59页 |
| 4.1 Research Questions | 第47页 |
| 4.2 Participants | 第47-48页 |
| 4.3 Instruments | 第48-52页 |
| 4.3.1 Aptitude Test | 第48-50页 |
| 4.3.2 Task Design | 第50-52页 |
| 4.4 Measurements | 第52-55页 |
| 4.4.1 Measurement for the FLAT | 第53页 |
| 4.4.2 Measurements for the Task Complexity | 第53-55页 |
| 4.5 Procedures | 第55-59页 |
| Chapter Five Results and Discussions | 第59-91页 |
| 5.1 Relationship between the Components of Aptitude and Task Complexity | 第59-73页 |
| 5.1.1 Correlation between Aptitude and the Picture 1 Narration Task | 第59-64页 |
| 5.1.2 Correlation between Aptitude and Video Description Writing Task | 第64-69页 |
| 5.1.3 Other Findings | 第69-73页 |
| 5.2 Differences between Picture Narration Writing Tasks and Video Description Writing Tasks | 第73-88页 |
| 5.2.1 The Differences of Lexical Variety | 第73-76页 |
| 5.2.2 The Differences of Syntactic Complexity among Different Tasks | 第76-83页 |
| 5.2.3 The Differences of Accuracy among Tasks | 第83-88页 |
| 5.3 The Change of Accuracy under the Teaching Intervention | 第88-91页 |
| Chapter Six Conclusion | 第91-97页 |
| 6.1 Conclusion of the Whole Study | 第91-93页 |
| 6.2 Implications for English Teaching | 第93-94页 |
| 6.3 Limitations | 第94-95页 |
| 6.4 Suggestions for the Future Studies | 第95-97页 |
| Bibliography | 第97-105页 |
| Acknowledgements | 第105-107页 |
| Published Paper | 第107页 |
