[Eeglablist] Running a Second ICA
david03182 at hotmail.com
Mon Dec 8 12:44:31 PST 2008
I'm working on an analysis technique which requires that I run 2 ICAs
on the same data set. The first is to remove standard eye artifact
components, the second to remove components related to other
artifacts. I don't use exactly the same data but for the second ICA I
use about one third of each trial of the data I use for the first ICA.
After listening to the discussions posted here I was wondering whether
I should also run a PCA before the second ICA or whether I would not
need to do that because I am not using exactly the same data for the
second ICA. If I do need to run a PCA, should I reduce the data to
the same number of principal components for each subject or could the
number of principal components be equal to the number of ICs retained
after the first ICA and therefore different for each subject?
Many Thanks ...
Oxford Brookes University
Get Windows Live Messenger on your Mobile
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the eeglablist