Hi all,
we came across this thread, because we have very similar problems. It seems that the factor P is coded as a dummy variable. Why is P coded using the values -1 and 1 ? Would it be also possible to use two separate EV's (one for P and one for G) with the values 0 and 1? Waht would be the difference and how would the interactions look like?
Many thanks for any comment,
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