Hi Helmut,
Many thanks for your insightful response to Mike. Could you recommend some papers, tutorials or whatever material that may provide clear guidelines for good practices in ROIs definitions ? More generally, I would be interested in any guidelines regarding the thresholding issues for whole-brain fMRI statistical analysis, given that numerous approaches are found across studies, sometimes with FWE correction, sometimes without, but with an apparently arbitrary cut-off for the number of voxels, along with varying p values, from 5% to .001....letting novice neuroimagers like me a bit confused, or leading to a "very-constraining-approach-or-nothing" conception...
Any insight / advice would be soooo helpful !
Thanks again for the great job done here by all of you, SPM experts !
Pierre-Yves
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