Hi Mike,
sorry for the delay, I was unavailable for most of yesterday. There's
not a way to automatically do it, but it can be done. Eg, if you have
two groups (classes) and one continuous variable (eg, age), and you want
to test for an interaction between group and age, then you'd set up the
fsgd with two groups and one continuous variable and run with DODS. This
will give you 4 regressors: (1) Intercept for Group1 (2) Intercept for
Group2, (3) Age Slope for Group1, and (4) Age Slope for Group2. The
interaction is just the difference between the slopes, so use a contrast
of [0 0 1 -1].
doug
Mike Chee wrote:
Dear Bruce and Co.,
I was wondering if there is a way to perform ANOVA on the cortical
thickness data; for example evaluating the interaction between age,
gender and three (categorical variables) levels of blood pressure? Its
not obvious how this might be done using the current interface.
Mike Chee
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