The new site is at http://psychometricon.net/libirt/
The new site is at http://psychometricon.net/libirt/
Library of functions to estimate the items and abilities from the responses of subjects to a questionnaire. The IRT models supported are the logistic model, the multivariate logistic model, the graded model and smoothing by penalization and kernel.
The project aims to provide the open access internet-based computerized adaptive testing (CAT) program based on the 3 parametric logistic model or Rasch Model out of item response theory. It will add item analysis programs based on item response theo