Hello,
I am planning to do bivariate ACE modelling using IQ and brain imaging derived measures and I would be very grateful if you could help me answer a few questions regarding the general assumptions for this type of modelling.
Are there any initial assumptions about the variables (or correlations between them) that should be met in order to apply for bivariate ACE? For example, is it meaningful to perform bivariate ACE when the correlation between variables is relatively low, or, in other words, should the initial correlation exceed a particular threshold for a bivariate ACE to be meaningful?
Thank you very much for your help.
Best,
Aurina