Commercial Software
BILOG 3 program implements item response theoretic methods of item analysis and test scoring. Item parameter estimation is by marginal maximum likelihood, with provision for concurrent estimation of the latent distribution.
Phone: (847) 675-0720
Fax: (847) 675-2140
URL: http://www.ssicentral.com/irt/bilog.htm
Email: sales@ssicentral.com