Hello,
I have a couple of questions about using featquery to calculate
comparable copes and varcopes over an ROI.
If I have an event related design with two tasks the EVS for these tasks could
have very different ppheights, so if I had a cope for each of these
tasks the featquery results for calculating % change of the 2 copes
over an ROI would not be comparable unless I rescaled, correct? Is it
easiest just to use avwmaths to undo the original ppheight scaling and
apply the new scale (probably based on the min/max range of an
isolated event)? For a group analysis is featquery averaging the
ppheights over subjects? I'm assuming I could find the averaged
ppheight in the featquery log somewhere.
Second, when featquery is applied to varcopes does it use the ppheight
at all or would I have to rescale that as well to make it comparable
to the corresponding averaged cope?
Thanks in advance,
Jeanette
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