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Thanks for the quick reply! One last thing: when I specify a contrast between two EVs, will they be previously contrasted to the baseline to? For example: in contrast1 I define a value of 1 for EV1 and in contrast2 I define 1 for EV1 and -1 for EV2. In contrast2 will EV1 and EV2 be contrasted to baseline also or just to each other? Thanks again, this forum is a major help for starters! Carlos On 15/02/2008, Mark Jenkinson <[log in to unmask]> wrote: > > Hi, > > You should not use baseline EVs in Feat. > It may work, but it will be close to rank deficient normally. > The best way is to omit it and then all EVs are implicitly contrasted > wrt baseline and the modeling inside Feat works optimally. > > All the best, > Mark > > > > On 15 Feb 2008, at 18:10, carlos silva pereira wrote: > > > Hi to all! > > Basic question: in the Feat full model setup is it the same to 1) > > consider the baseline condition as en EV and contrast it with the > > main condition; 2) just omit the baseline and FSL will contrast it > > with all the EV's? > > I ask this because I tried both options and results are very > > similar, although not absolutely equal. > > Thanks in advance. > > Carlos >