Hello, Apparently Ben Bolker and Douglas Bates have different opinions on testing fixed effects in GLMMs (see below). Does anyone know of any (simulation) papers on this issue? Ben Bolker wrote
But ... LRTs are non-recommended (anticonservative) for comparing fixed effects of LMMs hence (presumably) for GLMMs, unless sample size (# blocks/"residual" total sample size) is large, no?
Douglas Bates wrote:
If I were using glmer to fit a generalized linear mixed model I would use likelihood ratio tests rather than Wald tests. That is, I would fit a model including a particular term then fit it again without that
term and calculate the difference in the deviance values, comparing that to a chi-square.
Paul Goedhart, Biometris, Wageningen UR, The Netherlands