Han Bao is the Assistant Director of Psychometrics at Smarter Balanced. Han has more than 7 years of experience in assessment design and development including conducting psychometric analyses such as IRT & CTT equating, IRT calibration and simulation studies, DIF and cut-score analyses. She has led multiple research studies, including application of multidimensional item response theory and applied measurement issues related to retesting effects in large-scale educational assessment and credentialing examination. She also has strong programming skills using a variety of statistical software programs. Dr. Bao holds doctorates in Measurement, Statistics & Evaluation from the University of Maryland, College Park.