Dear spmers,
question from a new user.
As far I have see, there is no user defined 'covariates of no interest'
option in SPM99 fMRI module.
1.
Could I use the 'user-defined regressor' to emulate this option ?
In this case, and because it's a multi sessions analysis, I suppose that
the array of this no-interest variable as to be cut in respect of
session'lenghts.
Then I suppose that this covariate account for some variance of the
data. But is this variance 'removed' from the contrasts [1 -1 ...] for
which this covariate is set to 0 ? And how could I know how munch this
covariate account for ?
2. Is it an other way do defined a 'covariates of no interest' ?
(even if matlab programing is needed)
Denis Fize
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