Xing Liu, Ph.D., is an associate professor of educational research and assessment atEastern Connecticut State University. He received his Ph.D. in measurement, evaluation, andassessment in the field of educational psychology from the University of Connecticut, Storrs. Hisinterests include categorical data analysis, multilevel modeling, longitudinal data analysis, structural equation modeling, and educational assessment. His major publications focus on advancedstatistical models. His articles have been recognized among the most popular papers published inthe Journal of Modern Applied Statistica...