gPPI and fixing the sub_TR

AFNI Message Board
1

Dear AFNI experts,

I am currently trying to perform a gPPI analysis, but I’m not quite sure about how to apply the “upsampling” from step 2.
As an example, I have a TR=2s, 196 volumes, my stimulus onsets look like [13.938 113.938 159.938…], and stimulus duration is fixed at 0.3s. So how should I fix the sub_TR ?

Thank you very much in advance,

JS

2

Hi JS,

I will be away for a bit, but consider following the demonstration
scripts under AFNI_data6/FT_analysis/PPI.

The README.txt file is actually a top level script that one can run
after the corresponding single subject analysis has been completed.
So the PPI scripts are real examples that you can follow.

  • rick