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hello i am attempting to conduct a ppi analysis. however, prior to conducting the ppi i need to select a voi and crete a voi.mat file for the ppi. i am using spm 5 and cannot find the procedures for performing the voi using this version. according the email list, i should click the voi button, however, i do see a voi button and the small volume button in the spm5 gui does not follow the same procedures as the emails i have read. i have my first level model and contrast created, so any directions on conducting the voi and being able to create the voi.mat file for use in the ppi analysis would be greatly appreciated. thank you for your time. jef