Thai Q. Ong is a Senior Psychometrician at NBME, where he oversees assessment development, scoring, and reporting for various subspecialty medical boards and USMLE. His medical education research focuses on evaluating the validity of assessment scores used throughout the educational journey, including USMLE, in-training, and board certification examinations. His measurement research focuses on applications of latent variable models to cognitive and non-cognitive assessments. Thai holds a doctorate in assessment and measurement from James Madison University. Prior to NBME, he worked at ABIM, where he led the scoring and reporting of the Internal Medicine Certification and Maintenance of Certification Examinations.