Hi all,

I want to use 3dClustSim to perform multiple comparisons correction. Before doing so, I need to use 3dFWHMx to approximate the ACF. However, I'm not sure what kind of residual file I should pick up as input file. It will be greatly appreciated if you could give me some advice.

I used lme4 package in R to perform a hierarchical linear modeling for each voxel ( the sample was a group of subjects other than time series). I wonder if I need to use the square residuals (I assumed that sum of square rediduals could be used as a group statistic for residual file) as input for 3dFWHMx or I need to extract the residual for every data point (a subject) and save the complete set of residuals for each voxel, feeding a four-dimensional dataset (3d space for spatial coordinates and the fourth dimension indicating different data point (subject) ) to 3dFWHMx?

Wish somebody could help.

Thanks.

Yovan