Message-ID: <loom.20140509T220519-84@post.gmane.org>
Date: 2014-05-09T20:07:05Z
From: Ben Bolker
Subject: difference in lmer results with REML = FALSE and refitML
I've logged this at https://github.com/lme4/lme4/issues/202 .
Henrik Singmann <henrik.singmann at ...> writes:
>
> Dear list,
>
> based on a question on the sister list for linguistics
> (http://thread.gmane.org/gmane.comp.lang.r.linguistics/844/focus=846)
> I came across some weird
> inconsistencies when comparing a lmer fit with REML = FALSE
> and the same model first fitted with REML and
> then refitted with ML. The strange behavior is that both ML
> fits do not agree. This seems to be somewhat unexpected.
>
> See case below.
>
> Cheers,
> Henrik
I do at least get convergence warnings (with my current
development version of lme4) for the second, suboptimal fit.
I should look at slices to see what the surface looks like
(i.e. where the suboptimal stopping point is), and how this
behaves with other optimizers.
thanks
Ben Bolker