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2012 May 26
2
Assessing interaction effects in GLMMs
...gnificant predictors of the patterns of shade use while Tertile and Max are not. In addition, a Time*Tertile interaction effect is a good predictor as well. I now need to assess how the specific interaction effect conditions differ to one another. So, for example, how does shade use differ between 10h00 at low shade and 10h00 at high shade? I tried using the package multcomp, but that will only allow me to work out the contrasts for the first-order effects (Time, Tertile) but won't allow me to do so for the interaction effects. Any ideas? My code: > m1 <- lmer(y ~ Time*Tertile + (1|Ind...