Alina von Davier, PhD. is Chief of Assessment at Duolingo and CEO and Founder of EdAstra Tech. von Davier is a Honorary Research Fellow at the University of Oxford and a Senior Research Fellow at Carnegie Mellon University. She is also a VC Partner with Learn Launch. von Davier operates at the forefront of Computational Psychometrics. Her current research interests involve developing psychometric methodologies in support of digital-first assessments, such as the Duolingo English Test, using techniques incorporating machine learning, data mining, Bayesian inference methods, and stochastic processes. Her co-authored book on adaptive and multistage testing Computerized Adaptive and Multistage Testing with R (2017) and the R package to support the applications received the B. Hanson Award from National Council of Measurement in Education (NCME) in 2022. She won the Career Award from the Association of Test Publishers in 2020.