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

[Ben Bolker]

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  For what it's worth, I believe this is out of date, _except_ for 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