[R-sig-ME] R questions

[Gavin Simpson]

On Fri, 2007-08-03 at 00:46 -0700, Iasonas Lamprianou wrote:
> Dear friends, 
> 
> in this web page
> http://cran.r-project.org/src/contrib/Views/Psychometrics.html, I
> read: A multilevel Rasch model can be estimated using the package lme4
> with functions for mixed-effects models with crossed or partially
> crossed random effects. How can this be done? Is there an example to
> read?

You might take a look at Doran et al (2006; Vol 20 issue 2 of the
Journal Of Statistical Software - link below), which discusses Rasch
models with lme4.

http://www.jstatsoft.org/index.php?vol=20

HTH

G

> 
> Also, why are the random effects (BLUPS  usinf the ranef fucnction)
> and the fixed effects estimates the same most pf the time?
> 
> Thanks
> 
> jason
>  
> Dr. Iasonas Lamprianou
> Department of Education
> The University of Manchester
> Oxford Road, Manchester M13 9PL, UK
> Tel. 0044 161 275 3485
> iasonas.lamprianou at manchester.ac.uk

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