Pyschometrics Links
Item Response Theory
- The Free IRT Project
Free IRT programs for various software packages.
- LEM: FREE IRT software from J. Vermunt
Links to Articles, Books, and Software on IRT and other Latent Trait Models.
- Scientific Central International: Home of BILOG, MULTILOG and PARSCALE
IRT Software
- CAT Central: A Global Resource for Computerized Adaptive Testing
Everything you want to know about CAT is located here.
- Assessment Systems Corporation
Books, software, and extensive consulting in test development and analysis, psychometrics, data analysis, and electronic test delivery
- Jim Ramsay's TestGraf
Provides a graphical analysis of multiple-choice test items and/or responses using Ramsay's "kernel smoothing" approach to item response theory.
- David Thissen's Home page
Links to IRT software and courses.
- Lawrence Rudner's IRT site: Very Helpful
Free IRT books, software, and tutorials.
Structural Equations Modeling