EunHee Keum is a Research Scientist at CRESST. She received her PhD in Quantitative Psychology from the Ohio State University. Her research interests involve the development of multi-stage testing approaches and the application of latent variable models, particularly item response theory and factor analysis models, to small-sample longitudinal data. Her work focuses on evaluating and improving the design and delivery of educational assessments. She also provides general assistance on statistical and psychometric issues arising in other ongoing CRESST research projects.