Young-Sun Lee

Young-Sun Lee is an Associate Professor of Psychology and Education at Teachers College, Columbia University. Their academic affiliations include the departments of Human Development and Measurement, Evaluation, and Statistics. They hold a Ph.D. in Educational Psychology (Educational Measurement & Statistics) from the University of Wisconsin-Madison, an M.A. and B.A. from Ewha Womans University in Seoul, South Korea.

Lee's research focuses on psychometrics, including Classical Test Theory, Item Response Theory, and Cognitive Diagnosis Modeling, alongside educational and psychological measurement. Their work emphasizes applied statistics in assessment design, model validation, and educational software development.

Publications span cognitive diagnostic frameworks, latent variable modeling, and applications in special education and healthcare. Lee has co-edited the Handbook of Diagnostic Classification Models and contributed to technical manuals for educational assessment tools like mCLASS:MATH. Their research bridges theoretical statistical models with practical applications in education and clinical settings.