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secondfactor
2012 Sep 07
2
Contrasts for 2x4 interaction in mixed effects model
...ifferent than 2A, whether 1B is significantly different than
1B, etc; I am not interested in the comparison of 1A~1B~1C~1D.
However, the latter comparisons are what the coefficients seem to give me
when I summarize my model. For instance, the coefficient for the
interaction term "FirstFactor2:SecondFactorB" doesn't tell me how different
2B is from 1B, it tells me how different 2B is from 2A.
Is there a straightforward way to code the contrasts so that the
coefficients I get for the interaction terms do the comparisons I'm
interested in?
Thank you for your advice,
Steve Politzer-Ahles...