基于项目反应理论的自适应考试系统设计

摘要

This paper introduces the basic knowledge and limitations of traditional test theory, and describes the basic concept of item response theory (IRT). Then computerized adaptive testing system is put forward with the combination of the rapid development of computer network technology. It specifically dicusses the structure, functions of the module of system. The system greatly improves the item selection strategy and reduce the probability of item exposure. Additionally, it reduces testing length by random item selection auording to testee competence level, thus improving test efficiently compared with traditional on-line testing system.%针对传统考试的缺点和不足,介绍了项目反应理论基本概念,在此基础上结合计算机网络技术的发展提出了计算机自适应考试系统的设计.并进一步阐述了系统的体系结构,各功能模块的设计,重点改进了按区分度的选题策略,有效地控制试题曝光率.能够根据不同能力被测试者随机选择试题项目,减少了测试长度,与传统在线考试系统相比提高了考试效率.