摘要
本模拟研究的目标组与参照组的项目作答反应数据是通过Rasch模型产生的,模拟研究探讨了LRDIF检测方法在不同DIF比例和纯化方式下的检测效果。研究结果表明:LRDIF方法的检测结果在DIF比例≤40%时是可信的;当采用LRDIF方法进行DIF检测时,有必要对匹配变量进行纯化,最好是能够进行迭代纯化。
In this simulation study, the detection effects of LRDIF procedure under conditions of various DIF proportions and purification types were studied. The results show that： it is reliable to use LRDIF procedure to detect DIF when DIF proportion is not more than 40% ; when using LRDIF procedure, it is necessary to purify matching variable and it is best to conduct iterative purification.
出处
《考试研究》
2014年第2期54-58,共5页
Examinations Research
关键词
DIF比例
纯化方式
LRDIF方法
项目功能差异
DIF Proportion, Purification Type, LRDIF Procedure, Differential Item Functioning
