[R-sig-ME] Very different results from lmer and MCMCglmm

[Stuart Luppescu]

On Tue, 2012-01-31 at 19:43 +0000, ONKELINX, Thierry wrote:
> A few remarks on the model itself. You are adding 3 factors both as
> fixed and random effect. That is not a good idea since they will be
> competing for exact the same information. Hence the huge CI with the
> MCMC model. 

Ah, right. I reran it without the fixed effects and the results were
much better.

> I'm a bit surprised with the lmer results as well. I would expect to
> see zero variances for these random effects.

Wow. lmer is really robust!

Thanks very much for the help.
-- 
Stuart Luppescu -=- slu .at. ccsr.uchicago.edu        
University of Chicago -=- CCSR 
才文と智奈美の父 -=-    Kernel 3.2.1-gentoo-r2                
If I were to be treated by a cure created by
 stepwise regression, I would prefer voodoo.    -- 
 Dieter Menne (in a thread about regressions with
 many variables)       R-help (October 2009)