I am running a linear mixed effects model in R using (lme4). I have two independent variables: word types (five levels) and lexicality (two levels), and one dependent variable; reaction time. I used the following formula to look at the overall interaction between the dependent variables.
mydata.mod1=lmer(RT~lexicality*wordType*(1|Item)+(1|Subject), mydata) summary(mydata.mod1)
My question now is about the possibility of looking at each level under word types separately and compare it to lexicality based on reaction time. For example, I want to take Type Two (under word types) and compare it to lexicality. What terms should I include to run this type of analysis. I have tried the following formula, but it did not show what I needed:
Is there something I missed?