Thanks Gang, this is coming together...
We model monkey to account for differences (and to see if there is an outlier); but the flip-side if this is that this factor hopefully "soaks up" variance attributable to monkey.
I still want to confirm my nesting argument is correct.
I want Session nested in Monkey (but note session must be called 'Subj'):
I think this is how to write that, correct?
-ranEff '~1+Monk|Subj'