Thanks, Doug.
I added (-4s) delay and plotted the data but I got the same delay as no shift. Also I did (+4) delay and lost most of the activation.
Do you have any recommendations?
Thanks, Sarah
On Wed, Mar 28, 2018 at 4:39 PM, Douglas N. Greve dgreve@mgh.harvard.edu wrote:
You can use the -delay flag in mkanalysis-sess
doug
On 03/28/2018 05:35 PM, Sarah Cole wrote:
Hi Doug,
I have a block design experiment. After analyzing the data and plotting the response magnitude across the TRs, we see that there is a systematic lag in the response. For example, in a 16s block (TR=2s), at TR-1 and TR-2 the response goes down and then starts rising from TR-3. This is consistent across the subjects and blocks.
We used to shift our raw data by 2 TRs when we were using SPM.
How can we do this in FreeSurfer?
Thank you,
Sarah
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