"The usefulness and applications of Bayesian statistics for educational data analysis" Hiroshi watanabe, National Center for University Entrance Examination. "On the statistical predictions for educational and psychological research" Hirotada Hirose, Tokyo Women's Christian University. "Pass analysis and its extention" Tomoichi Ishizuka. Railway Labour Science Research Institute. "Factor analysis of qualitative data" Haruo Yanai, Chiba University. "Selection of Variables in multivariate data analysis"