Hello,
I've used this command to analyse changes in brain volume:
mod1<-aov(Volume~Sex*Lobe*Tissue+Error(Subject/(Lobe*Tissue)),data.vslt)
I'm comparing males/females. For every subject I have 8 volume measurements
(4 different brain lobes and 2 different tissues (grey/white matter)).
As aov() provides only type I anovas, I would like to use lmer() with type
II, however, I have struggled to find the right syntaxis.
How should I write the model I use with aov() using lmer()??
Specifying Subject as a random effect is straightforward
mod2<-lmer(Volume~Sex*Lobe*Tissue+(1|Subject),data.vslt)
but I can't figure out the /(Lobe*Tissue) part...
Thank you very much in advance!
roberto
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