Esther Ulitzsch

Esther Ulitzsch is an Associate Professor at the University of Oslo's Centre for Educational Measurement (CEMO). Her research focuses on advancing psychometric models, particularly Bayesian latent variable techniques for small-sample conditions, and analyzing digital interaction data from simulated learning environments. She holds a PhD from Freie Universität Berlin and previously worked as a Research Associate at the IPN – Leibniz Institute for Science and Mathematics Education in Kiel, Germany.

Education:

• PhD in Educational Measurement (Freie Universität Berlin)
• Research Associate at IPN Kiel

Research Interests:

• IRT model development for aberrant response detection
• Efficient estimation in small samples
• Clickstream analysis for student behavior
• Test-taking engagement dynamics

Publications: Over 20 peer-reviewed articles since 2017, including work on mixture models for careless responding, neural networks for IRT estimation, and Bayesian factor modeling. Recent contributions address response time analysis, cross-country measurement invariance, and sequential process mining in interactive tasks.

Affiliations: Active in the CREATE (Research on Equality in Education) and FREMO (Frontier Research in Educational Measurement) groups at CEMO.