Cluster Connectivity Criterion

Dear prof YAN

the Cluster Connectivity Criterion could be chosen among 6 voxels (surface), 18 voxels (edge) or 26 voxels (corner) according to rmm value.

what different between three type of criterion, and which is the best?

thanks for your help

Which connection criterion is more commonly used and why?

SPM's default is 18. AFNI's default is 26.

I would use 26 as it's more inclusive.