Paul Jewsbury is a research scientist in the Foundational Psychometric and Statistical Research center at ETS. He received a Ph.D. in psychometrics in 2014 and a B.S. in psychology (honors)/physics in 2009 from the University of Melbourne, Australia. His research interests include latent variable modelling, item response theory–latent regression models with many predictors, large-scale assessments, error variance estimation, multistage and computerized adaptive tests, factor analysis, and cognitive abilities. He is published in journals including Journal of Educational and Behavioral Statistics, Applied Psychological Measurement, Psychological Assessment, and Journal of Experimental Psychology: General.