英语写作 AES 系统评分效度的实证研究

摘要

英语写作自动评分系统（ AES）在国外的英语写作测试和教学领域应用越来越广泛，但国内对其信、效度的实证研究还十分欠缺。以句酷网为例，从人分散度、相关性和等级一致性等方面研究了AES系统的评分效度。结果表明，尽管机器评分区分度不如人工评分，但其总的评分效度尚可，其结果的稳定性可以满足国内英语写作课堂教学的需要。%Although AES is playing a more and more important part in English writing tests and teaching abroad , little empirical research has been carried out into its reliability and validity in Chi-na.The research, a case study of Juku AES , investigated its scoring validity from the perspectives of person separability , consistency and classification agreement .It is concluded that the scoring va-lidity of Juku is so adequate as to satisfy the needs of English classroom writing tasks in spite of its relatively poorer discrimination .