[R] Item Response Analysis

Patrick E. McKnight pem at theriver.com
Tue Nov 6 17:10:04 CET 2001

For those interested in Item Response models in R, please consult the 
following URL:


We would greatly appreciate help integrating our existing C++ parameter 
estimation code into R.  I have completed the graphics functions and am just 
about finished with the fit indices (all in R/S code), however, I still use 
the estimation code outside R.  Brian, we have both dichotomous as well as 
polytomous (generalized partial credit model) parameter estimation 
procedures.  The code is released under a suitable license for R folks.  If 
anyone who has R and C++ knowledge would be willing to help, we would greatly 
appreciate it.  Thanks.



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