Hi all,
I need to know a bit about how higher level Feat handles mixed cope files.
I have a unique data set that is split according to subject generated
ratings into 1min data sets (30 seconds before rating, 30 seconds after).
It is a graduated rating of 1-4, but subjects were free to rate up or down.
I'm interested in the transitions (1 to 2, 2 to 3, 3to4).
Some subjects had multiple transitions such as 1 2 3 2 3 (so this has 2
ratings of 2 to 3)
The data (all data) is fed through FSLwarp using FNIRT transforms to get the
data into MNI space.
Then I've used Feat to combine repeated ratings per subject using fixed effects.
So the issue that I have is that the cope files being passed up to my final
processing stage are mixed; some have the mid-level processing and some do
not. The cope files with mid-level processing look like they are transformed
in some way (I'm guessing to MNI152 1x1x1, but the data without mid-level
processing is 2x2x2).
I'm worried that this will create false positives in the data because I am
unsure of how Feat handles data sets that are mixed in this way. I'm hoping
it doesn't matter, but I need to check and then think of how to resolve it.
Thanks all,
-James
|