st: New version of -raschtest (v7)- and new module -traces- on SSC

[Jean-Benoit Hardouin <jean-benoit.hardouin@orscentre.org>]

Thanks to Kit Baum, there is a new version of the -raschtest- and 
-raschtestv7- packages and a new module -traces- downloadable from SSC.

-raschtest- estimates the parameters of a Rasch model and realizes 
several analyses to evaluate the fit. In this new version, several tests 
have been added : R1c fit test when the latent trait is considered as a 
set of parameters or  R1m fit test when the latent trait is considered 
as a random variable, the split test to valuate the principle of 
specific objectivity, the U-test to  test the equality of the slopes of 
the Item Response Functions (IRF). The very popular OUTFIT and INFIT 
indexes have been added.  The module uses -gllamm- to estimate the Bayes 
expected a posteriori estimators of the latent trait. -raschtest- runs 
under Stata 8.

-raschtestv7- is a version of -raschtest- for Stata 7.

-traces- is a new module on SSC which allows representing the traces of 
a set of dichotomous or polytomous items (probability to respond to each 
modality as a function of the score computed as the sum of the responses 
to all the items).

More informations about these modules are available on my website : 
http://anaqol.free.fr

Jean-Benoit Hardouin

--
***************************************************************************
Jean-Benoit Hardouin
Biostatistician
Regional Health Observatory - Orl�ans - France
Email : jean-benoit.hardouin@orscentre.org
**************************************************************************

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