文摘
英文文摘
声明
Acknowledgements
Chapter One Introduction
1.1 Significance of the study
1.2 Purpose of the study
1.3 General research questions
1.4 Organization of the thesis
Chapter Two Literature Review and Theoretical Framework
2.1 Definition of task
2.2 Task complexity and difficulty
2.2.1 Brown et al.'s matrix
2.2.2 Candlin's criteria of selecting and grading task difficulty
2.2.3 Skehan's model
2.3 Robinson's Triadic Componential Framework for L2 task design
2.4 Oral production accuracy and complexity
2.5 Task complexity, attention and memory and language production
2.5.1 Task complexity and language production
2.5.2 Attention, memory and language production
2.5.3 Levelt's Speech Production Model
2.6 Previous studies of task complexity
2.6.1 Studies along resource-directing dimensions
2.6.2 Studies along resource-dispersing dimensions
2.6.3 Differences between the present and previous studies
Chapter Three Methodology
3.1 Research questions and hypotheses
3.2 Research Design
3.2.1 Subjects and Setting
3.2.2 Design
3.2.3 Narrative tasks
3.2.4 Procedure
3.2.5 Measures of linguistic accuracy and complexity
3.2.6 Data collection and analysis
Chapter Four Results and Discussion
4.1 Results
4.2 Discussion
4.2.1 The effects of planning time on oral production accuracy and complexity
4.2.2 The effects of reasoning demands and There-and-Then on oral production accuracy and complexity
4.2.3 Joint effects of task complexity and EFL learners' proficiency level on accuracy and complexity
Chapter Five Conclusion
5.1 Major findings
5.2 Pedagogical implications
5.3 Limitations of the study
References
Appendix
