Software by Brad Hanson
This page gives links to some software I have written that is freely available
The following are some C++ source code libraries which I use for numerical
- IRT Command Language (ICL) - Application
that can perform single- or multiple-group estimation of the 1-, 2-, and 3-parameter
logistic item response models for dichotomous items, and the partial credit
model and generalized partial credit model for polytomous items. ICL supercedes
the Estimation Program for Dichotomous Item Response Models (EPDIRM) by including
estimation of polytomous as well as dichotomous models.
- Equating with the Multiple-Choice Model
- Applications to perform equating (IRT scale transformation) for the multiple-choice
and nominal response models as described in this paper.
Compiled versions of these programs are available for Windows 95/NT. The source
code is also available.
Software - Some test equating software for Mac OS and Windows 95 that
I helped to write is available from the Iowa
- BBEdit Plug-Ins - I have written some
plug-ins for the Macintosh text editor BBEdit
that allow it to interact with two other Macintosh programs: MacPerl
(an implementation of the Perl programming language), and Textures
(an implementation of the TeX typesetting language).
Brad Hanson's Home Page
Sofware by Brad Hanson
Last updated: October 15, 2006 (ww)