Harold Gulliksen Psychometric Research Fellow

ETS (Mentors: Sandip Sinharay and Michael Fauss)

• Develop sequential methods for real-time detection of aberrant examinee behavior using joint response and response-time data (dissertation research).
• First-authored manuscript on forensic item clones for verifying external AI assistance and recovering ability estimates, under review at Journal of Educational and Behavioral Statistics.

Psychometric Research Intern

National Commission on Certification of Physician Assistants (NCCPA)

• Developed an LLM-based content-risk scoring rubric for certification items, rated by multiple large language models and evaluated with a generalizability study.
• Built a Bayesian change-point model that uses content-risk scores as prior information to detect compromised items in a longitudinal assessment program.
• First-authored manuscript under review at Applied Psychological Measurement.

Graduate Research Assistant

School of Engineering Education, Purdue University (NSF Grant No. 2141847)

• Developed, maintained, and refined CD-CAT algorithms; led parameter estimation, item-selection optimization, online calibration, and CAT tuning procedures; conducted simulation studies.
• Supported mathematics cognitive-diagnosis development and psychometric refinement; performed psychometric analyses of operational LASSO-platform data.

Statistical Consultant

Psychometric Investigation Laboratory, Purdue University

• Advise researchers on statistical methods, research design, and data management.

Research Assistant, Classroom Interaction Analysis

East China Normal University

• Analyzed classroom interaction patterns from video data (Suzhou micro-monitoring project).

Research Assistant, Clinical Pharmacist Training Evaluation

Chinese Hospital Association (partnership project)

• Evaluated trainee satisfaction using ordinal logistic regression.

Research Assistant, Student Creativity Study

East China Normal University

• Modeled creativity data from 4,833 students across 48 schools using Rasch analysis.

Research Assistant, Conceptual Understanding Project

East China Normal University

• Conducted systematic literature reviews on conceptual understanding in education.

Research Assistant, Quality-of-Life Survey Studies

East China Normal University

• Conducted data analysis for quality-of-life surveys and program-evaluation reports.

Research Assistant, International-Student Perception Study

East China Normal University

• Interviewed 17 international students on their perceptions of Shanghai.

Graduate Teaching Assistant

Department of Educational Studies, Purdue University

• EDPS 32700 Classroom Assessment (Dr. Anne Traynor).

Invited Guest Lecturer

Department of Educational Studies, Purdue University

• EDPS 63600 Item Response Theory: led an R tutorial on IRT parameter estimation with the mirt package and an anchor-test linking exercise.

Workshop Instructor

Psychometric Investigation Laboratory, Purdue University

• Using Machine Learning to Analyze Educational Data workshop series.