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Hi, I really do like the option with the confound matrix, and use it on a frequent basis. As Govinda pointed out, you need a matrix file with each column representing a confound vector. The attached script should allow you to create such a file in case you have a set of single columns files, and/or a set of numbers of volumes that suffer from artefacts. I hope this helps, wolf Jennifer Bramen wrote: > Hi All, > > I want to use the newish "Add addition confound EVs" option to model artifact in my fMRI > data in feat, but I do not see any way to increase the number of EVs from 1 to whatever I > want to model for each subject. I tried creating a matrix, but that didn't work either. > Anyone using this? > > Thanks > > Jen >