Hi Gang,
Thanks for your response!
Yes, VolRemaining does not vary within subject - thanks for pointing out that it should be a between-subjects quantitative variable. Is it still appropriate to specify that in the code with the -qVars "VolRemaining" option?
VolRemaining is significantly different between two of my groups (between CON and POME), so I want to covary for it to ensure that any group differences are not due to this covariate of no interest. If I'm not interested in the interaction between Group and VolRemaining, would it be better to model it as -bsVars "Group+VolRemaining" or -bsVars "Group*VolRemaining" ?
Thanks!
Janelle