A list of such programs and discussion can be found at:

http://ourworld.compuserve.com/homepages/jsuebersax/binary.htm

The results of Knol & Berger (1991) and Parry & MacArdle (1991) 
(see above web page for citations) suggest that there is not much 
difference in results between the Muthen method and the simpler 
method of factoring tetrachoric correlations.  For additional 
information (including examples using PRELIS/LISREL and SAS) on 
factoring tetrachorics, see

http://ourworld.compuserve.com/homepages/jsuebersax/irt.htm 

Hope this helps.

John Uebersax


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