Get standardized estimates
Details
For modsem_da
, and modsem_mplus
objects,
the interaction term is not standardized such that var(xz) = 1
.
The interaction term is not an actual variable in the model, meaning that it does not
have a variance. It must therefore be calculated from the other parameters in the model.
Assuming normality and zero-means, the variance is calculated as
var(xz) = var(x) * var(z) + cov(x, z)^2
. Thus setting the variance of the interaction
term to 1 would only be 'correct' if the correlation between x
and z
is zero.
This means that the standardized estimates for the interaction term will
be different from those using lavaan
, since there the interaction term is an
actual latent variable in the model, with a standardized variance of 1.