[R] IRT Package

[Dimitris Rizopoulos]

In fact, there some common IRT models that ltm cannot currently 
handle, e.g., the three-parameter logistic model or the graded 
response model; however, I do plan to incorporate these models in the 
near future.


Best,
Dimitris


----- Original Message ----- 
From: "Doran, Harold" <HDoran at air.org>
To: "Caio Lucidius Naberezny Azevedo" <c_naber at yahoo.com.br>; 
<r-help at stat.math.ethz.ch>
Sent: Sunday, November 27, 2005 2:52 PM
Subject: Re: [R] IRT Package


>I do not believe another IRT package exists. However, I have recently 
>used the rasch() function in ltm for a study I am doing and have 
>found it very useful. I'm curious (as I'm sure the ltm developer is) 
>as to what are you doing that ltm cannot handle.
>
> Harold
>
>
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch on behalf of Caio Lucidius 
> Naberezny Azevedo
> Sent: Sat 11/26/2005 4:50 PM
> To: r-help at stat.math.ethz.ch
> Cc:
> Subject: [R] IRT Package
>
> Hi all,
>
>  Could anyone tell me if there is some package that fits any Item 
> Response Model (further the ltm package)?
>
>  Regards,
>
> Caio
>
>
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