st: Updated versions of several modules on SSC

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

Thanks to Kit Baum, several modules have been updated on SSC :
      - -raschtest- is a module which allows analysing data by a Rasch 
model. Test of Differential Item Functioning (DIF) and Standardized 
OUTFIT and INFIT statistics have been added
      - -geekel2d- is a module which estimates the parameters of 
several unidimendional or bidimensional Items Response Models. The 
algorithm has been improved, and is faster
      - -simirt- is a module which simulates data by Item Responses 
Models. Simulation of polytomous (ordinal) variables by a Rating Scale 
Model have been added
      - -msp- is a module which realizes a Mokken Scale Procedure to 
select items in unidimensional scales. English langage has been improved 
in the outputs and in the help file

These modules can been downloaded on SSC
. ssc describe raschtest
. ssc describe geekel2d
. ssc describe simirt
. ssc describe msp
and are described on my website : http://anaqol.free.fr
Best regards
Jean-Benoit Hardouin

--
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Jean-Benoit Hardouin
PhD in Public Health/ Biostatistics
Regional Health Observatory - Orl�ans - France
Email : jean-benoit.hardouin@orscentre.org
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