Hi Peter,
Thanks so much!
Two points to clarify re: #1 - you said to use the "unsmoothed" data (m0wrp1*.nii), but I'm wondering if this should be the smoothed data (sm0wrp1*.nii) as the input to 3dFWHMx?
Also, we already creaed a custom (DARTEL) GM template in SPM8 for our sample (given it is a pediatric sample) -- do you know if this is appropraite to use as the mask input to 3dFWHMx and 3dClustSim or would you suggest going the route you suggested with creating one with AFNI tools?
Thanks again,
Andrea