I am conducting a trivariate twin analysis and after running ACE model my estimates of C for males are significant for phenotypes 1 and 3 but not significant for phenotype 2. AE model results in significant worsening of the goodness of fit.
I have run ACE model with c21, c22 and c32 fixed to 0 using the attached script.
Is that correct way of doing it or is there another way?
Any comments will be appreciated