谈任务设计变量对输出效果的影响

任务设计是任务型教学法中非常重要的环节，而任务设计变量的把握是任务设计成败的关键。任务设计变量包括任务输入变量、任务条件变量和任务结果变量，每个变量又包含一些任务设计因素。大量的研究结果表明：任务设计变量及其所包含的任务设计因素对任务的输出效果产生直接或间接的影响。本文结合国外相关研究结果探讨这些变量在准确度、流利度和复杂度方面对输出效果的影响，以期有助于教师在设计任务时选择和控制这些变量以达到期望的输出效果。

The Effects of Task Design Variables on Task Outcomes

Task design plays a very import role in task-based instruction,while the manipulation of task design variables are crucial to the successful design of a task.Task design variables include task input,task condition and task outcome variables,and each variable still includes some design factors.The bulk of research indicates that task variables influence task performance both directly and indirectly.The present paper,based on the previous research,discusses how these variables may affect learners' output in accuracy,fluency and complexity,with the expectations that it may help the language teachers choose and manipulate these variables for students to achieve desirable task performance.