On Thu, Apr 30, 2009 at 2:18 PM, Esther Fujiwara
<[log in to unmask]> wrote:
How about dummy motion regressors for those subjects whose motion parameters I don't want to include (trying to keep down the amount of data to throw out ...)?
Michael T Rubens wrote:
You need to keep the number of covariates constant across subjects.
-Michael
On Thu, Apr 30, 2009 at 1:59 PM, Esther Fujiwara <[log in to unmask] <mailto:[log in to unmask]>> wrote:
Is it possible to include motion parameters in first level analyses
for some
subjects (i.e., those moving around more) but not others if all
subjects are
later combined in a second level analysis? I suppose not, but I am
not sure why.
Thanks for any comments!
Esther
--
Research Associate
Gazzaley Lab
Department of Neurology
University of California, San Francisco