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

By *klang*

Created *08/28/2009 - 21:22*

Fri, 08/28/2009 - 21:22 — klang [1]

Hi All,

I am wondering if it is possible to place constraints on lambda loadings (i.e., constraining the loadings of a two indicator construct to be equal, or constraining the average of a construct's loadings to equal 1 to set the scale by the effects coding method). I've been working primarily with the path specification approach, and I can't see an obvious way that this could be implemented, I've seen mention of equality constraints on the forums, but I can't find any mention of such constraints or suggestions in the documentation. Any insight would be greatly appreciated.

**Links:**

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

[2] http://openmx.psyc.virginia.edu/thread/19-welcome-openmx-sem-modeling-forum

[3] http://openmx.psyc.virginia.edu/forums/openmx-help/openmx-structural-equation-modeling