IRT from SSI

This book describes the Item Response Theory (IRT) methodology as developed by Darrell Bock and his students over the past 25 years and implemented in their computer programs BILOG-MG, MULTILOG, PARSCALE, and TESTFACT. It is especially useful for users of these computer programs in the educational assessment field. IRT is now also applied in the healthcare field in combination with computer adaptive testing (CAT).