On 10 Sep 2010, at 19:41, Michael Keaser wrote:
Stephen,
Thanks for the response.
I have some more questions
1) For the mcflirt pre-stats in melodic, is there a way to change refvol from the default (middle) to the first volume in the timeseries? I didn't see an option in the gui.
Not from the GUI, but you can from the mcflirt command line (or edit the FEAT scritps in $FSLDIR/tcl)
2) What exactly occurs with spatial regression? And, is there an advantage of spatial regression as opposed to taking the spatial component map and averaging all voxels in a given subject from that map to derive a timecourse for regression?
The spatial regression is very similar to averaging the timecourses of the voxels within a spatial map (using the values within the map as weightings); the big difference though is that this is done as a multiple regression (using all ICA spatial maps as regressios in one big GLM), with all that that implies, rather than one at a time separately.
Cheers.
Thanks,
Michael
