[R-sig-ME] generalized linear mixed models: large differences when using glmmPQL or lmer with laplace approximation

Ben Bolker bolker at ufl.edu
Tue Oct 7 19:43:37 CEST 2008

Martijn Vandegehuchte wrote:
> First of all, thanks a lot for the info.
> I know the differences seem small, but most ecological journals still
> let their opinion about ecological relevance of predictors depend
> completely on p-values... So I think I'll stick to lmer because of the
> Laplace approximation.

  Well, Laplace should be better anyway.  (If the difference were in
the other direction -- non-significant with Laplace and significant with
glmmPQL -- I would still tell you to use Laplace.)

  To speak to Greg Snow's comment ("don't worry about p-values, just
look at predictions") -- this is really tough.  I still don't know
what to do about the compromise between how statistics should be done
and how journal editors seem to insist it should be done ...


More information about the R-sig-mixed-models mailing list