Hi all, No-one seems to know an answer to this! In MVB, given an ROI, how do you determine what size of search volume you use to do the analysis? e.g. sphere with radius 5mm? or sphere with radius 15mm? The first will show compact to be the spatial prior with the most evidence, whereas 15mm will show sparse to be the best. Please Help! -- Paddy Ross PhD Student Centre for Cognitive Neuroimaging Institute of Neuroscience and Psychology University of Glasgow ---------------------------------------------------------------- This message was sent using the Web mail system for The University of Glasgow School of Psychology ------------------------------------------------------------------