Shu Jing Yen (PhD, Measurement, Applied Statistics and Evaluation, University of Maryland) is the Director of Psychometric and Quantitative Research at the Center for Applied Linguistics. She directs the Psychometric and Quantitative Research Team and also serves as senior Psychometrician for ACCESS for ELLs®.

In her current position, she directs and designs studies on the outcome of quantitative and psychometric research and analyses pertaining to language assessment projects. 

Prior to joining CAL in 2010, Dr. Yen was a Research Scientist at Institute of Education Sciences overseeing large scale federate funded research grants in developing innovative educational assessments and accountability models. Prior to that, she was a Psychometrician at CTB/McGraw-Hill and Maryland State Department of Education where she gained considerable experiences in all aspects of designing, developing, and analyzing large scale high stakes K-12 assessments. She also had extensive experiences in language testing which includes directing psychometric analyses for an adult English language assessment used for federal accountability reporting. 

Active in research on psychometric, Dr. Yen is particularly interested in the psychometric issues related to creating and maintaining vertical scales, dimensionality, differential item functioning, and rater effect.