Published on *OpenMx* (http://openmx.psyc.virginia.edu)

By *Ryan*

Created *02/08/2014 - 21:34*

Sat, 02/08/2014 - 21:34 — Ryan [1]

Hi there,

I am using A/Prof Mike Cheung's TSSEM (See: https://dl.dropboxusercontent.com/u/25182759/Fixed%20and%20Random%20Effe... [2]). 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)?

Best,

R

**Links:**

[1] http://openmx.psyc.virginia.edu/users/ryan

[2] https://dl.dropboxusercontent.com/u/25182759/Fixed%20and%20Random%20Effects%20Meta%20Analytic%20Structural%20Equation%20Modeling.pdf

[3] http://openmx.psyc.virginia.edu/thread/2583

[4] http://openmx.psyc.virginia.edu/thread/2549

[5] http://openmx.psyc.virginia.edu/forums/third-party-software/metasem