[R-sig-ME] Calculating SE from GLMM results (using glmer{lme4})

Ben Bolker bolker at ufl.edu
Sun Sep 27 19:08:20 CEST 2009

Raldo Kruger wrote:
> Hi Ben,
> Thanks for your help. See my responses below (~~~).
> Regards,
> Raldo

>>  It's also
>> worth considering whether you are really getting reliable answers based
>> on only 4 sites -- I would also try this with Site as a fixed effect
>> and see whether the answers differ considerably.  (I know that,
>> philosophically, Site and Year are both random effects, and you may
>> run into trouble with reviewers who are used to classical ANOVA
> ~~~ I've been using glmer, and it doesn't seem to accept a model with
> no random factors. Is ~~~that true, and if not, how can i  write the
> model without a random factor so that it is ~~~accepted by glmer?

  If you have a model with no random factors, then glm() should work
fine (although be aware that the likelihoods/AIC values will not be
directly comparable between glm() and glmer())

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