Hi all,
I am trying to fit a univariate model.
I fitted the saturated model first and I got correlations of 0.64 and 0.34 for MZ and DZ respectively.
However, when I fitted the ACE model, I got these results:
A=0.04
C=0.52
E=0.44
So, I decided to check the correlations from the ACE model and I got 0.56 and 0.54 for MZ and DZ respectively.
I know that correlations may change from the ACE to the saturated model. However, these differences are huge.
I have tried with different scripts, umx and with/without covariates and I get the same results.
My sample comprise 100 pairs and there are no missing data.
Do you know why there are so big differences between the saturated and the ACE model?
Thank you so much in advance.