Multilevel CFA with categorical variables

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Kat's picture
Kat
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Joined: 03/07/2012

I was hoping to find out if there was any documentation on multilevel CFA - I have a sample of children clustered within families. The model I am trying to fit has 12 observed categorical variables (0,1,2) and 4 latent variables. Could you point me in the direction of some examples?

Ryne's picture
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Joined: 07/31/2009
There are a number of

There are a number of examples of twin and family data in our documentation and the 'workshops' tab. The major difficulty for your problem is the inclusion of ordinal data: OpenMx currently has a hard limit of 20 ordinal variables, and any 'wide-format' method for 12 variables will require more ordinal variables than we can support. Multilevel SEM is something that we're working on, but unfortunately we're not there yet. The same goes for weighted least-squares optimization, which should be free of that ordinal variable limit. Hopefully we'll be of more help in the future, and the code examples throughout the site can help you specify some version of the model in either OpenMx or another program.