I am using A/Prof Mike Cheung's TSSEM (See: https://dl.dropboxusercontent.com/u/25182759/Fixed%20and%20Random%20Effe... ). The 2nd stage of this method is constructing a path model (a SEM model) based on the A, S, and F matrices of OpenMx.
Mike's examples (as well as the examples of OpenMx) show only 'reflective models' (i.e., the arrows of paths are from a latent variable to its elements.
My question is: can we build formative models (i.e., the arrows of paths are from elements to a latent variable)?
Technically we can do so by specifying the A and S matrices. However, does the formative model make sense in terms of OpenMx (i.e., the reticular-action-model approach, McArdle & McDonald, 1984)?