Dear list, I am wondering if packages such as MuMIn are suitable for running model selection analyses on lmer objects? 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...? If MuMIn is not suitable, are there any other options for automating model selection on mixed models? Many thanks in advance! Sarah
Model selection with lme4
3 messages · Sarah Dryhurst, 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
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