Re: [R] differential item function for item response theory

From: Doran, Harold <HDoran_at_air.org>
Date: Tue 09 Jan 2007 - 21:15:36 GMT


I don't know of any functions specifically designed to handle DIF (e.g., mantel-hantzel). But, ltm does give you the point estimates and standard errors so you can do a t-test between the focal and reference groups.

> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of SHEN,FENG
> Sent: Tuesday, January 09, 2007 4:09 PM
> To: r-help@stat.math.ethz.ch
> Subject: [R] differential item function for item response theory
>
> 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!
>
> Feng
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed Jan 10 12:35:52 2007

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Wed 10 Jan 2007 - 02:30:25 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.