[R-sig-ME] 3 level multivariate mixed effects IRT model

[Benjamin Michael Kelcey]

Dear List,

Is anyone aware of how to implement a three level multivariate mixed  
effects IRT (2 parameter) model in lme4 or another package? I have  
found literature concerning the Rasch model using the lme4 package  
(e.g. Estimating the Multilevle Rasch Model) and a 2 level using the  
mlirt package but have not been able to find examples using both. Any  
suggestions would be much appreciated.

Thank you,
Ben