绩效,在外语教学中是指某种教学理论方法、教学技术等与学习者语言学习投入如时间等之间的比例关系。在外语写作中,指以促进学习者书面语言交际能力为目的的教学投入,在一定学习者写作训练投入(如时间)内,对学习者该能力提高所产生的实际作用。对写作评价,外语写作中有机组成部分,在学习者完成写作任务中的绩效研究,具有重要的意义。PTA(Primary Trait Analysis)基本要素评价法应用在外语写作的评价中,可以更好地衡量、检验和促进学生的书面写作能力,从而提高学生书面语言交际能力的学习绩效。 Performance, in foreign language teaching refers to a teaching theory and teaching methods, teaching technology and language input of learners, such as the time between the proportional relationship. In foreign language writing, refers to the teaching input for the purpose of promoting learners ’written language communicative competence. It plays an important role in enhancing learners’ competence in the training of a certain learner writing (such as time). It is of great significance to evaluate writing, organic components of foreign language writing, and performance of learners in completing writing tasks. Primary Trait Analysis (PTA) is applied in the evaluation of foreign language writing to better measure, test and promote students’ written writing skills, thus improving their learning performance in written language communication.