hi ged.
thanks for your reply about the covariates. that was exactly what i thought
to do next, but i was unsure if this was correct to do so. so you helped me
a lot in this.
may i ask you another question about this topic?
what can i do, if i now want to see if the one group of my participants
(patients) show other brain regions which correlate with the pain in
contrast to the group of healthy controls, still controlling for the
nuisance variable of anxiety (my first question was about the correlation
in the complete group, now i want to include the factor "group").
do i have to model this in the "full factorial" model of spm5? if so, do
you know a source where a dummy like me can understand how to model this in
spm5 (i couldn't find anything useful in the spm5 manual)?
thanks a lot
markus
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