Hello, You can use the -q option to report the maximum number of permutations possible for a particular contrast - the randomise manual ( http://www.fmrib.ox.ac.uk/fsl/randomise/index.html ) has information how p-value limits are related to the number of permutations. Many Regards Matthew > I am comparing 5 patients and 5 controls. What is the max number of permutations possible (and does this relate to the minimum p value obtainable)? > > Stefano Marenco, MD > NIMH/GCAP > Building 10, room 3C104 > 10 Center Drive > Bethesda, MD 20892 > tel 301 435-8964 > fax 301 480-7795 > email: [log in to unmask] >