CD-CAT初始阶段项目选取方法

发布时间：2019-02-27 06:53

【摘要】：CD-CAT是CDA同CAT的相结合的产物,适用于课堂教学,是教师补救教学、学生自我学习的重要工具。作为CD-CAT重要组成部分的初始阶段项目选取方法是影响测验判准率的重要因素。本文基于现有研究和CDA的项目区分度提出了四种新的初始阶段项目选取方法:CTTID法、CDI法、CTTIDR*法和CDIR*法。通过模拟研究发现,在定长的CD-CAT下,题库质量是HD-HV下,初始阶段结束时,CTTIDR*法的PCCR比现有的T阵法高了.2999,比PWKL高了.1707,其它题库下趋势相同。整个测验结束时CTTIDR*法的判准率仍然是最高的。在变长的CD-CAT下,最大后验概率大于.7、.8、.9下,CTTIDR*法的被试平均测验长度比T阵法分别缩短了2.6170、2.2347、1.7470道题。
[Abstract]:CD-CAT is the product of the combination of CDA and CAT. It is suitable for classroom teaching. It is an important tool for teachers' remedial teaching and students' self-learning. As an important part of CD-CAT, the method of item selection in the initial stage is an important factor that affects the accuracy of the test. Based on the existing research and the project differentiation of CDA, this paper presents four new methods of project selection in the initial stage: CTTID method, CDI method, CTTIDR* method and CDIR* method. The simulation results show that at the end of the initial stage, the PCCR of the CTTIDR* method is higher than that of the existing T-array method. 2999 and .1707 are higher than the existing T-array method at the end of the initial stage. Under the fixed-length CD-CAT, the quality of the question bank is under the same trend as that of the other questions bank. The accuracy rate of the CTTIDR* method was still the highest at the end of the test. Under the condition of variable length CD-CAT, the maximum posterior probability was greater than 0.7, 0.8, and .9, the average test length of CTTIDR* method was 2.6170, 2.2347 and 1.7470 shorter than that of T-array method, and the average test length of the test was 2.6170, 2.2347 and 1.7470 respectively.
【作者单位】：江西师范大学心理学院;江西师范大学初等教育学院;
【基金】：国家自然科学基金(31500909、31600909) 2014年江西省高校人文社会科学一般项目(XL1403) 2015年江西省高校人文社会科学项目(XL1509) 江西省研究生创新基金(YC2015-B025)的资助
【分类号】：B841

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