LMM without Random effect:
I want to run an LMM both with and without the random factor (ID). And then
extract the log-lik values from the two models in order to generate a
p-value.
with random factor as: lmer(y~x+(1|ID),data)
Question: can I simply substitute a dummy var (e.g. populated by zeros) for
"ID" to run the model without the random factor? when I try this R returns
values that seem reasonable, but I want to be sure this is appropriate.
>From other inquires in the forum it seems that substituting ("ID-1") or some
variant like that, does not work.
Thanks for your thoughts.
Baugh
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