Hi Mike, Yes, take the results from the longitudinal stream, they are less noisy.

Best Martin

Sent via my smartphone, please excuse brevity.

-------- Original message -------- From: Michael Kranz mbkranz@gmail.com Date:05/31/2014 10:09 AM (GMT-05:00) To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] Longitudinal data for cross sectional individual differences study

Hi Freesurfers,

Just wanted to verify:

I have ran my subjects through the longitudinal processing stream (two time points a couple weeks apart).

I want to predict cognitive performance (from the first time point) with Freesurfer stats. As I have the longitudinal data available, would it be better to use longitudinally processed stats (as opposed to the cross sectional stats)?

I ask because I'm not aware of any publications that do this...

Thanks much, Mike Kranz

Michael Kranz Graduate Research Assistant | Beckman Institute University of Illinois 314-323-1329