Item Response Theory
Only place on the internet
The Engine Behind Every Adaptive Exam
Drag θ, a, b, and c simultaneously. Watch the item characteristic curve respond instantly. The same model powering the SAT, GRE, and QuantegyAI itself — made interactive for the first time.
8 modules
Live ICC sandbox
3PL explorer
CAT simulation
~3–4 hours · 🏆 Signature course