| Acknowledgements | 第1-5页 |
| 摘要 | 第5-6页 |
| Abstract | 第6-11页 |
| List of Figures | 第11页 |
| List of Tables | 第11-12页 |
| List of Appendix | 第12页 |
| Abbreviations | 第12-13页 |
| Chapter One INTRODUCTION | 第13-17页 |
| ·Roles of input and output in SLA | 第13-14页 |
| ·Significance of the study | 第14-16页 |
| ·The purpose of the study | 第16-17页 |
| Chapter Two LITERATURE REVIEW | 第17-36页 |
| ·Overview | 第17页 |
| ·The Role of input in SLA | 第17-19页 |
| ·Input hypothesis | 第17-18页 |
| ·Criticisms on the input hypothesis | 第18-19页 |
| ·The role of consciousness in second language learning | 第19-21页 |
| ·Different views on the role of consciousness | 第19-20页 |
| ·Noticing hypothesis | 第20-21页 |
| ·Input processing (IP) | 第21-24页 |
| ·Input processing | 第21-22页 |
| ·Processes of form-meaning connections | 第22-24页 |
| ·Processing instruction (PI) | 第24-26页 |
| ·The role of output in SLA | 第26-29页 |
| ·Output Hypothesis | 第26-27页 |
| ·An integrated model of SLA in Output Hypothesis | 第27-28页 |
| ·One output-based instruction—the traditional instruction (TI) | 第28-29页 |
| ·Comparative studies of PI and TI | 第29-36页 |
| ·Empirical studies of PI and TI | 第29-34页 |
| ·Limitations of previous researches | 第34-36页 |
| Chapter Three METHODOLOGY | 第36-49页 |
| ·Overview | 第36页 |
| ·Research questions | 第36页 |
| ·Subjects | 第36-38页 |
| ·The target structures | 第38-41页 |
| ·The Classification of if-conditionals | 第38-40页 |
| ·Reasons for selecting the unreal if-conditionals as the target structures | 第40-41页 |
| ·The teaching material | 第41-42页 |
| ·Treatments | 第42-46页 |
| ·Traditional instruction | 第42-43页 |
| ·Processing instruction | 第43-46页 |
| ·Summary | 第46页 |
| ·The control group | 第46页 |
| ·Assessments | 第46-47页 |
| ·Treatment procedures | 第47-49页 |
| Chapter Four RESULTS | 第49-61页 |
| ·Overview | 第49页 |
| ·Results of the interpretation tasks | 第49-51页 |
| ·Results of the production tasks | 第51-53页 |
| ·Results of time effect | 第53-57页 |
| ·Results of the item types | 第57-61页 |
| ·Results of the hypothetical unreal if-conditionals | 第57-58页 |
| ·Results of the counterfactual unreal if-conditionals | 第58-61页 |
| Chapter Five DISCUSSIONS | 第61-69页 |
| ·Instructional effects of TI, PI and the control group | 第61-63页 |
| ·Discussion on the results of the processing instruction | 第63-64页 |
| ·Discussion on the results of the traditional instruction | 第64-67页 |
| ·Summary | 第67-69页 |
| Chapter Six CONCLUSION | 第69-74页 |
| ·Summary of the study | 第69-70页 |
| ·Pedagogical implications | 第70-72页 |
| ·Limitations of the study | 第72页 |
| ·Suggestions for further research | 第72-74页 |
| References | 第74-85页 |
| Appendix A: Traditional instruction (1) —Hypothetical unreal conditionals | 第85-88页 |
| Appendix B: Traditional Instruction (2) --Counterfactual unreal conditionals | 第88-91页 |
| Appendix C: Processing Instruction (1) —Hypothetical unreal conditionals | 第91-97页 |
| Appendix D: Processing Instruction (2) —Counterfactual unreal conditionals | 第97-102页 |
| Appendix E: Pretest | 第102-104页 |
| Appendix F: Immediate posttest | 第104-106页 |
| Appendix G: Delayed posttest | 第106-107页 |
| Appendix H: Raw scores for TI group in the pretest | 第107-108页 |
| Appendix I: Raw Scores for Tl group in the immediate posttest | 第108-109页 |
| Appendix J: Raw scores for Tl group in the delayed posttest | 第109-110页 |
| Appendix K: Raw scores for PI group in the pretest | 第110-111页 |
| Appendix L: Raw Scores for PI group in the immediate posttest | 第111-112页 |
| Appendix M: Raw scores for PI group in the delayed posttest | 第112-113页 |
| Appendix N: Raw scores for the control group in the pretest | 第113-114页 |
| Appendix O: Raw scores for the control group in the immediate posttest | 第114-115页 |
| Appendix P: Raw scores for the control group in the delayed posttest | 第115页 |
