Hi,

There was an issue when I attempted to extract the psi function for an object of class lmerMod (ultimately a merMod object). I got the error:
Error in envRefInferField(x, what, getClass(class(x)), selfEnv) :
‘family’ is not a valid field or method name for reference class “lmerResp”

Since grab_psiFUN works with glmerMod objects, I tried fitting the LMM with glmer with argument family="gaussian", but as you may know, lme4 now forces the user to resort to lmer in that case.

Thanks for this awesome package!