Greetings, I have a question about group comparisons using covariates and
specifically, related to a series of posts from the archives (Jun 2007). In
the example presented below (from the archives), where age was being used as
the covariate, do you switch the sign of EV3 for the second group? I ask
because when you run the between group analyses, you set group 1 > group 2
as [1 -1]. Thanks, Tonya
>>>
>>> Group EV1(group1) EV2 (group2) EV3 (age )
>>> 1 1 0 3
>>> 1 1 0 1
>>> 1 1 0 -2.5
>>> 1 1 0 4
>>> 1 0 1 -1
>>> 1 0 1 2
>>> 1 0 1 1.7
>>> 1 0 1 1.5
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