Welcome to OpenIRT.com

You have reached the directory for open source item response theory software. This site is currently work in progress. If you know of OpenSource IRT software that should be referenced here, please drop the webmaster a note.

Directory of free, open source source software for IRT and classical test theory applications


Home of J. Patrick Meyer’s java-based item analysis program.

www.OpenIRT.com/b-a-h/ Bradley A. Hanson’s website with software and technical papers.


Werner Wothke’s website with some upgrades of Brad Hanson’s code and documentation.


Webmaster: Werner Wothke

Date:November 16, 2014