Hi, Assuming the confounding factors are in the form of time series (one entry per volume), you can put them in either place. Cheers, Jeanette On Wed, Dec 25, 2013 at 8:45 AM, Mark <[log in to unmask]> wrote: > Hi FSL experts, > > I have several regressors of no interest (or confounding factors) and I > want to put it in the 1st-level model. I intend to put them as several EVs > but I noticed there is a "Add additional confound EVs" in Stats, so where > should I input these confounding factors? And, the two places will yield > the same results for my regressors of interest? > > Thanks >