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second
2012 Sep 12
1
Contrasts in mixed effects model: difference between differences
...ome variable, Latency) between the levels of First:
test <- lmer( Latency ~ Second / First + (1|Subject) + (1|Item), data )
This gives me nice output like:
SecondA:First2 -0.009879 0.008283 -1.19
SecondB:First2 -0.032136 0.008293 -3.88
SecondC:First2 0.006748 0.008131 0.83
SecondD:First2 0.006153 0.008206 0.75
Now, though, I am also interested in directly testing whether those
differences differ between levels of Second. So, for example, whether the
-0.009879 coefficient for...