Dear Travis, you can use the TFCE toolbox which also works for surface data. Simply build a parametric model with SPM and use this model for non-parametric statistics with TFCE. You can either download the toolbox here or you can use the install function for TFCE inside CAT12: http://www.neuro.uni-jena.de/tfce/ Best, Christian On Thu, 27 Jul 2017 21:04:44 +0100, Travis Beckwith <[log in to unmask]> wrote: >Does anybody know whether there is a way to conduct permutation testing/Monte Carlo simulations on the GIFTI outputs from the CAT12 toolbox for SPM12? > >Thanks, > >Travis