[R-sig-ME] anova (lm, lmer ) question

Ben Bolker bbolker at gmail.com
Sat Oct 4 01:06:18 CEST 2014

romunov <romunov at ...> writes:

> FWIW, this is from the glmm faq site <http://glmm.wikidot.com/faq>.
> How can I test whether a random effect is significant?


>    - *do not* compare lmer models with the corresponding lm fits, or
>    glmer/glm; the log-likelihoods are not commensurate (i.e., they include
>    different additive terms)

  For what it's worth, I believe this is out of date, _except_ for 
glmer fits with nAGQ>1.  It should be possible to implement
anova(<merMod>,<lm>/<glm>) -- it's only a nuisance (sadly, if we
were still using S4 classes at this level it would be easier ...)

  Ben Bolker

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