基于IRT的大学英语词汇在线自适应测试系统的设计

The Design of IRT-Based Online Adaptive Testing System for College English Vocabulary

如何科学有效地测量学习者的词汇量，以及测试其对词汇的掌握程度是当前语言研究者十分关注的问题。文章根据词汇的广度、深度之间的相关性，提出了在广度测试的基础上进行深度测试的思想，并将项目反应理论的测试方法、设计思想，应用到实际测试系统中，最终设计实现了基于项目反映理论的大学英语四、六年级在线自适应单词测试系统。

How to measure learners’ breath of vocabulary scientifically and the depth in mastering vocabulary is a major issues which many language researchers are focusing on currently. This article introduces the correlation between the breadth and depth of vocabulary testing system is achieved for College English Band-4 and Band-6， by applying the testing method of Item Response Theory (IRT) and design thoughts to practical testing system.