Hi FSLer!
A question to tbss within-subject multi-session analysis:
I would like to do a group analysis with multiple sessions per subject.
When setting up a GLM matrix with each subject as an EV (1) I am warned to
set up a matrix that is rank deficient/linear combination. Permutating with
that matrix I dont find clusters of difference, while I do when using just
one session per subject or just treat the multi sessions as independent
images (only groupID connects them - Is that adequate?).
However, I´m not really interested in the timecourse, so I just would like
to use the multi-sessions as a stabilization of intra-subject variance, ie.
compare the mean-skeletons of subjects. Is that possible?
cheers,
Stefan
|