> the quantitative variable does vary within subject.
3dMVM would not work when the quantitative covariate is within-subject.
> Will 3dLME handle this model.
Use
-ranEff '~1+ probecentpainint'
with 3dLME
Regarding your 3dMVM script, there are missing quotes around all those -gltCode specifications. Plus the following line
-gltLabel 23 activetreat_vs_shampainintcov -gltCode 23 treatment : 1*anode +1*cathode -2*sham probecentpainint : -SC \
should be
-gltLabel 23 activetreat_vs_shampainintcov -gltCode 23 "treatment : 1*anode +1*cathode -2*sham probecentpainint :" \
-SC \
Gang
