omxManifestModelByParameterJacobian(model, defvar.row = 1,
standardize = FALSE)
standardize
argument is TRUE, then the Jacobian is for the standardized model.
For Normal expectations the standardized manifest model has the covariances returned as correlations, the variances returned as ones, the means returned as zeros, and the thresholds are returned as z-scores.
For the thresholds the z-scores are computed by using the model-implied means and variances.