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