Thanks to Kit Baum, there is now a new version of -raschtest-
downloadable from SSC (ssc install raschtest).
This module permit to estimate the parameters of a Rasch model, by
marginal maximum likelihood or by conditional maximum likelihood, to
compute the fit tests Q1 (van den Wollenberg) and the global fit test of
Adersen. The individual values of the latent trait are estimated. It is
possible to obtain several graphical representations (the empirical and
theoretical traces of each item, the information graph, and a graph to
compare the distribution of the latent trait and this one of the
difficulty parameters of the items).
This program use the gammasym module available on SSC (directly
installed with the "ssc install raschest" command).
A description of these two programs is available on my website
http://anaqol.free.fr
Best,
--
Jean-Benoit Hardouin,
Regional Health Observatory
Orl�ans - France
Email : [email protected]
