Dear SPMers,
I would like to carry out a t-test (or regression) analysis between 2
groups with the addition of a covariate variable. However, the covariate
is only relevant for one of the groups, and has no meaning for the other
group. Other than setting the covariate value to 0s for this group which
does not seem ideal, is there a better way to include the covariate in the
design matrix.
Thanks,
Gaby
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Brain Research Institute
Austin & Repatriation Medical Centre
Melbourne,
Victoria, 3081
Australia
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