help > RE: Compcor:Is linear trend removed prior to pca?
Nov 15, 2015  03:11 PM | Immanuel Elbau - MPI Psychiatry
RE: Compcor:Is linear trend removed prior to pca?
Hi Alfonso, 

I have two further questions concerning the aCompCor implementation in CONN: 
1) As a default, when one uses the CONN preprocessing pipeline, is the pca performed on spatially smoothed images or on non-smoothed ones?
2) For CSF and WM how-many components Do you recommend to use as covariates? Is there a way to display the amount of cumulative variance explained for each component within CONN to inform this decision?

Thank you and all the best!


Immanuel

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TitleAuthorDate
Immanuel Elbau Sep 17, 2015
Alfonso Nieto-Castanon Sep 17, 2015
RE: Compcor:Is linear trend removed prior to pca?
Immanuel Elbau Nov 15, 2015
Alfonso Nieto-Castanon Nov 16, 2015
Immanuel Elbau Oct 21, 2015