Dear SPM users,
I am analyzing resting state data of a group of healthy individuals
with a seed-based approach. In my regression model, I added the
extracted timeseries of the seed voxel as well as a few other
regressors (motion parameters, CSF, WM). The first level analysis
(t-test) shows strong activation in the common default mode areas.
However, when I set up the second level random effects model (all con
files combined in a one-sample t-test), there is no activation left.
No even the seed voxel lights up anymore. There is clearly some
mistake in setting up the second level analysis but I don't know what.
Does anybody have an idea? Any help would be aprreciated!
Thanks a lot,
Cornelia
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