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I want to test for the unidimensionality of a test. I am using IRT models (GLLAMM in Stata) however can't find any examples of how fopr instance DIMTEST is implemented. Any ideas?
Best wishes

Hi Paul,

I think you want to email the authors of gllamm not the authors of runmlwin!

You could also try contacting the author of the following page which gives several examples as to how to fir IRT models using gllamm
http://www.gllamm.org/faqs/models/irtfitb.html

Best wishes

George