[R-sig-ME] Posterior probability of attitude parameters in a Rasch model

Doran, Harold HDoran at air.org
Mon Jan 3 18:04:32 CET 2011

Or you can use the irt.ability function in the MiscPsycho package that yields MLEs, EAPs, or MAPs given some item parameters

> -----Original Message-----
> From: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-models-
> bounces at r-project.org] On Behalf Of Yvonnick Noel
> Sent: Monday, January 03, 2011 11:45 AM
> To: r-sig-mixed-models at r-project.org
> Subject: [R-sig-ME] Posterior probability of attitude parameters in a Rasch
> model
> Dear all,
> I have fitted a Rasch model to some data with glmer. From the results of
> this analysis (namely the item difficulty estimates) I would like to
> compute the posterior probability of any ability/attitude value, given
> some pattern of observed responses.
> What I would need are the quadrature points and weights that are used in
> a glmer analysis, assuming that the latent ability values are drawn from
> a gaussian. I can't find them in the result object slots (or did I miss
> them?).
> Thank you in advance for any hint,
> Best,
> Yvonnick Noel
> U. of Brittany, Rennes
> France
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