How to think about DIF, the most common approaches, and what to report so reviewers do not roast you.

A practical toolbox for real-world psychometrics: planning, modeling, validation, and reporting.

A practical guide to choosing between 2PL and GRM, interpreting parameters, and avoiding common IRT mistakes.

Heading to Washington, DC for psychometrics work: better measurement, clearer decisions, and a little methodological joy.

Why this blog exists: practical psychometrics, measurement, and applied statistics in plain language.