Dear SPMers,
I am attempting to model the connectivity on a set of factorial design
data which include two conditions A (including A1 and A2 level) and B
(including B1 and B2 level).
I want to construct the regressors in the form of "A1-A2" and "B1-B2" as
modulatory inputs to enter the model. Could anybody please tell me how to
construct the regressors representing the contrast of two levels, i.e.:
how to set up one regressor contrasting the two levels liking "1-1" {A1(1)
and A2(-1)} in SPM?
Thanks in advance
Laurence
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