Peng L. has a robust background in psychometrics and statistical analysis, beginning with a research assistant role at the University of Maryland from September 2002 to June 2008, where extensive work on validity studies and longitudinal performance analysis was conducted. Following this, Peng L. gained experience as an intern at the Association of American Medical Colleges and ACT before taking on a psychometrician position at Educational Testing Service (ETS) from September 2008 until January 2020, focusing on teacher licensure and English proficiency assessments. Currently serving as a Senior Psychometrician at ETS, since January 2020, Peng L. continues to specialize in English proficiency assessment. Educational credentials include a Master's degree in Economics from Xi'an Jiaotong University and a Ph.D. in Educational Statistics and Evaluation from the University of Maryland College Park.
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