If you’ve taken the GRE, GMAT, or certain professional certification exams, you may have noticed something odd: the questions seemed to adjust to your level. You weren’t imagining it. These tests use Computerized Adaptive Testing (CAT), a sophisticated approach that tailors each test to the individual test-taker in real time. …
A Beginner’s Guide to Item Response Theory (IRT): How Modern Tests Work
Every time you take a standardized test — an IQ assessment, a college entrance exam, a professional certification — the questions have been calibrated using sophisticated statistical models that most test-takers never learn about. Item Response Theory (IRT) is the mathematical framework behind virtually all modern psychological and educational testing, …