[R] differential item function for item response theory

From: SHEN,FENG <fshen_at_ufl.edu>
Date: Tue 09 Jan 2007 - 21:09:02 GMT

Hi my friends,

I'm very new to R and need your help.

I used R and ltm package for item response theory (IRT) modeling. I also need to compute differential item function (DIF) for IRT models. I searched the archive but basically found nothing. Could you help me find some sources about handling DIF of IRT?

Many thanks in advance!


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