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  • Duolingo
  • Pittsburgh
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wbelzak/README.md

I am currently a Senior Psychometrician at Duolingo.

I have a PhD and MA in Quantitative Psychology from UNC - Chapel Hill (2021, 2019; Advisor: Dan Bauer), an MA in Psychology from William & Mary (2017; Advisor: Todd Thrash), and a BA in Economics from N.C. State (2013).

I am broadly interested in psychometrics and human assessment. While most of my research has focused on measurement bias and personality/motivation, I have more recently been working on test security, test and rater reliability, and individual differences in decision-making.

My CV can be found here; my research papers can be found on Google Scholar; and my professional history can be found on LinkedIn. Feel free to reach out anytime at wbelzak@gmail.com.

Popular repositories

  1. regDIF regDIF Public

    regDIF: Regularized Differential Item Functioning

    R

  2. wbelzak wbelzak Public