Dear R Users, 

I am trying to calculate a mixed effect Anova with 2 nested between subject 
factors and two nested within subject factors. Specifically, I have data from 
two Agegroups (between subject variable old vs young) that are characterized by 
their genotype (between subjects, NESTED within Agegroup). All subjects make 
tests in two conditions (within subject, 2 levels), where the same test is 
repeated (within subject factor Block, NESTED within condition). 

I run the following model: 

aov(RT ~AGEGROUP*GENE*CONDITION*BLOCK + Error(ID/(CONDITION+BLOCK)), data = 
SRTT$LearnBlocks_KIBRA.df)   

Is this model correct? 

With the summary command, I get a whole lot of effects and I am partly confused 
what the correct error term for some of them is. I have the following four 
Error strata: 

ID
ID:CONDITION
ID:BLOCK
Within

I assume the condition and block effects can be obtained from the respective 
ID:CONDITON and ID:BLOCK error terms, respectively, correct? I am uncertain 
with respect to the between subject factors. Gene appears under all Error 
terms. Where is the correct effect listed? Where are the correct effects listed 
for the interactions involving Agegroup and Gene? 

Many thanks!
Nico


 
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