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ACE latent growth modeling

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Leo's picture
Joined: 01/09/2020 - 14:36
ACE latent growth modeling


I am trying to assess stability and change of a phenotype with longitudinal twin data with latent growth modeling. Besides from a more advanced script (dual score) in the Boulder workshops I was not able to find an OpenMx script for this. Now I have three questions:
1) Does such a script exist somewhere for OpenMx?
2) Is it possible to achieve this with umxcp? Assuming a linear model, I would choose two factors and then fix the factor loadings accordingly?
3) If I included only two waves, would a bivariate genetic model achieve the same result (umxace)?

Thank you very much!