[R] Anova for GLMM (lme4) is a valid method?
Douglas Bates
bates at stat.wisc.edu
Thu Apr 14 16:35:48 CEST 2005
Ronaldo Reis-Jr. wrote:
> Hi,
>
> I try to make a binomial analysis using GLMM in a longitudinal data file.
>
> Is correct to use anova(model) to access the significance of the fixed terms?
>
> Thanks
> Ronaldo
From lme4_0.95-1 on the GLMM function has been replaced by lmer with a
non-missing family argument. For the time being I would recommend
staying with lme4_0.9-x and using the anova(model) from that but bear in
mind that the Wald approximate tests are notoriously inaccurate for some
generalized linear models and generalized linear mixed models.
If you have only a single level of random effects and you also have
access to SAS I would suggest cross-checking the results against those
from SAS PROC NLMIXED. Getting better results for this calculation in
lmer models is on my "To Do" list but there are a lot of other tasks
above it.
More information about the R-help
mailing list