Ratna Nandakumar, Ph.D.
Ratna Nandakumar, Ph.D., is a professor in the School of Education at the University of Delaware, specializing in applied statistics and psychometrics. Since the 1980s, she has contributed to the development of statistical methodologies in the area of dimensionality and differential item functioning and authored numerous journal articles and book chapters. Her current area of research focuses on application of psychometrics in the area of health sciences.