Dr. Mei-Ling Ong received her Ph.D in the Department of Educational Psychology, Quantitative Methodology Programs from the University of Georgia in 2017. She was an application analyst specialist at the Georgia Center for Assessment (GCA) in Athens for two years. She joined the CFR as a research scientist in April 2018 to help with data management and data analyses. Her research interests are in psychometrics, especially with regard to item response theory (IRT) for use in analyzing longitudinal data and differential item functioning (DIF), through theoretical and applied research. Her research also utilizes the quantitative and statistical methods used in developmental psychology, such as adolescent development, and examines health outcomes with aging. Additionally, she is interested in the areas of structural equation modeling (SEM), hierarchical linear modeling (HLM), longitudinal data analysis, and multivariate data analysis.