Hello,
I am trying to calculate the variance of my parameter estiamtes inside a ROI for a given contrast. Since MARSBAR has no direct way of doing the trick I thought of using the PPI option of SPM. I create a VOI by using my ROI of interest for my contrast of interest. I'm a bit lost though with the contents of the stricture xY and where and how to calculate the variance of my parameter estimates. Can you please give me some indications?
Best
Nikola Valchev
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