Ability estimates for partial credit model

-----Original Message-----
From: r-help-bounces at r-project.org 
[mailto:r-help-bounces at r-project.org] On Behalf Of Andrej Kastrin
Sent: Thursday, September 18, 2008 8:15 AM
To: r-help
Subject: [R] Ability estimates for partial credit model

Dear all,

I'm working on ability estimates using Rasch model. Using the "ltm" 
package, the procedure is quite simple:

## Factor Scores for the Rasch model
fit <- rasch(LSAT)
factor.scores(fit)

What about Partial Credit Model (PCM)? For PCM I use PCM 
function from eRm package. Is there any similar function like 
factor.scores to estimate ability scores using PCM model?

Best, Andrej