【摘要】 序列概率比检测(SPRT)是0~1记分题计算机化掌握性测验(CMT)常用的一种测验终止原则,而对它在等级反应模型下CMT中的应用却少有研究。该研究采用计算机模拟的方法对等级反应模型下CMT的SPRT进行了相关研究。研究结果表明:不定区间(IR)的增大将会提高测验效率;测验的判别归类准确性先是随着IR的增大而提高,当IR增大到某个值时,将随着IR的增大而降低;α、β取值为0.1时的测验效率比取值为0.05时要高,但此时判别归类准确性在不同的划界分数处呈现出不同的差异;另外无论在哪种情况下,SPRT的稳定性都较好。更多还原

【Abstract】 It is well known that termination criterion is of great importance in computer mastery testing(CMT).The sequential probability ratio testing(SPRT)is one of the criterions and has been applied widely in dichotomous items.In this study,we used computer simulation to explore the characters of the SPRT based on GRM.The results of the simulation show that the expanding of the IR increases the efficiency of the CMT and the accuracy of the decision,but when the IR expands some value,the accuracy of the decision becomes decreasing gradually;and the testing becomes more efficient with the increasing of theα andβ,while at the same time,the accuracy changes differently at different cutscores.At last,the results also show the SPRT is stable well based on GRM.更多还原