> I had seen that we could average the <3dFWHM errts*> output values across subjects to use as the smoothing parameter
> in 3dClustSim. Is that what one would do in the case of ACF (i.e., average each of the values in the output of 3dFWHMx)?
Some extent of arbitrariness is involved here. In addition to the averaging approach, another conventional method is to obtain the population-level residuals from, for example, 3dMVM using the option -resid, and then estimate the spatial smoothness on the population-level residuals.
Gang
Edited 1 time(s). Last edit at 12/15/2022 09:45AM by Gang.