Hi, all. I'm about to do something really inefficient, and I thought
I'd ask if there were a better way before I started:
I have 15 subjects, each with 3 experiment sessions. Each session has
many (let's say 10) contrasts that I ultimately want to examine at the
group level.
I've run 15*3=45 first-level analyses, which gives me 45
SubjXSessionY.feat directories, each directory containing all of the
10 contrasts for that session.
I've run 15 fixed-effects second-level analyses, one for each subject,
which gives me 15 SubjX.gfeat directories. The nice thing about this
step is that it automatically included every contrast from the first
level analyses, so I didn't need to run 10 different second-level
analyses per subject.
Now I'd like to run my group analyses, and I'd really like it to do
all 10 contrasts at once, keeping the contrast names and orders so
that I can use the html report to get an overview of how my data are
looking. But my lower-level directories are the second-level gfeat
directories now, and FEAT complains that they're empty of COPEs. So,
as far as I can tell, it looks like I need to run 10 3rd level
analyses, instead of just a single one. And then I'll end up with a
bunch of gfeat directories each containing one COPE that's lost its
ties to the lower-level COPE names/definitions. Is this correct? Is
there a convenient way to do this? I keep thinking I'm overlooking an
obvious button somewehre, since it seems like this is perhaps the
*most* typical fMRI analysis stream, but I couldn't seem to find an
answer. My apologies in advance if this is just a searching failure on
my part.
Thanks!
Todd
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