Insights
Field notes on psychometrics, hiring science, and team intelligence.
May 18, 2026 · 8 min read
Classical test theory gives every item equal weight. IRT doesn't — and that's why your hiring scores get sharper.
May 02, 2026 · 5 min read
A new view that turns Big Five overlap into a single readable fingerprint per team.
Apr 14, 2026 · 6 min read
Decades of meta-analysis show one consistent winner. Most teams still don't do it.
Mar 30, 2026 · 7 min read
The 4/5ths rule, why it matters, and how to monitor it without spreadsheets.