结合项目反应时间与项目区分度的CAT选题新策略  

The New Item Selection Strategies in CAT in Combination withItem Response Time and Item Discrimination

作　　者：李佳[1] 况天昊 LI Jia;KUANG Tianhao(College of Computer Information Engineering,Jiangxi Normal University,Nanchang Jiangxi 330022,China;Information Engineering College,Jiangxi University of Technology,Nanchang Jiangxi 330098,China)

机构地区：[1]江西师范大学计算机信息工程学院,江西南昌330022 [2]江西科技学院信息工程学院,江西南昌330098

出　　处：《江西师范大学学报（自然科学版）》2023年第4期377-383,共7页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61967009,62067004,62267004,62067005)资助项目.

摘　　要：计算机化自适应测验(CAT)的测量有效性不仅在于测验的项目数量,而且还在于被试完成测验所花费的时间.该文提出的结合项目反应时间和项目区分度动态分层的选题新策略是一种连续升a降β的选题方法,该方法在保证测验精度的同时,不仅有效地降低了被试的测验时间,而且还提高了题库的利用率.蒙特卡罗(Monte Carlo)模拟实验结果表明:新选题方法在测验精度、测验时间有效性、题库利用率和测验安全性等评价指标中总体表现良好.Measurement efficiency of computerized adaptive testing shall not only be assessed in terms of the number of items administered but also in terms of the time it takes to complete the test.New item selection strategy based on both item response time and item discrimination are proposed in the paper.The item discrimination is increasing and the item time intensity is decreasing during the whole test process.The results of Monte Carlo study show that new method has better performances on the test estimation accuracy,testing time efficiency,testing safety and the utilization of the item bank.

关 键 词：计算机化自适应测验 选题策略 项目反应时间 项目区分度 项目曝光控制 

分 类 号：B841[哲学宗教—基础心理学]