2PL模型的EM缺失数据处理方法研究
张淑梅,辛涛,曾莉,孙佳楠
Extension of EM Algorithm for Finite Mixture in IRT for Missing Response Data
Zhang Shumei,Xin Tao,Zeng Li,Sun Jianan
应用概率统计 . 2011, (3): 241 -255 .