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Dear Tom et al., I have a couple of questions regarding the use and interpretation of the CorrClusTh.m script. When I run the script on an SPM.mat I am asked to define the "cluster defining th.", and it spits out a cluster size and an associated corrected P value. Does the cluster defining threshold refer to the single voxel height threshold (uncorrected)? And the output refers to the size of cluster of voxels at that level which would correspond to a FWE corrected statistic of combined height/extent? How do I report the use of this method (e.g. does it correspond to the one suggested in Hayasaka & Nichols, 2004)? Many thanks, Tobias. -- Tobias Egner, PhD fMRI Research Center Columbia University Neurological Institute, Box 108 710 West 168th Street New York, NY 10032 Tel: (+1) 212 342 0121 Fax: (+1) 212 342 0855 Email: [log in to unmask]