[R-sig-ME] Model selection with lme4

[Ben Bolker]

Sarah Dryhurst <s.dryhurst at ...> writes:

> 
> Dear list,
> 
> I am wondering if packages such as MuMIn are suitable for running
> model selection analyses on lmer objects?

  Yes, with model selection taking place only over the fixed
effects and with the caveats listed at http://glmm.wikidot.com/faq#aic

> 
> In the MuMIn vignette it gives examples of how to use it with a model
> from lme4, however the "dredge" function in MuMIn that generates all
> possible models uses ML, which I thought would not be appropriate for
> mixed models...?

  Why not ... ?  (If you're thinking about REML, it's not
appropriate for comparing models with different fixed effects anyway)

  Ben Bolker