Multi-group Multi-level CFA PreviousNext
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 Randi Garcia posted on Monday, April 11, 2011 - 5:49 pm
Hi, I am trying to run a multigroup multilevel CFA analysis to test if the between level factor variances are the same across groups. I get the following error message:

THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES COULD NOT BE
COMPUTED. THE MODEL MAY NOT BE IDENTIFIED. CHECK YOUR MODEL.
PROBLEM INVOLVING PARAMETER 44.

THE CONDITION NUMBER IS -0.771D-16.

When i run the model separately for each group is does just fine, so i can't figure out the problem. Any suggestions?
 Linda K. Muthen posted on Monday, April 11, 2011 - 8:17 pm
It sounds like you are freeing the first factor loading in the multiple group analysis. You should not mention the factor loading that is fixed to one in the group-specific MODEL commands.
 Randi Garcia posted on Tuesday, April 12, 2011 - 8:08 pm
Hi again, actually I have all the first order loadings fixed to zero, and they are not mentioned in the second and third model statements. However, I have second order factors as well, and the loadings onto these second order factors are also fixed to 1...but I mentioned them in the group-specific model commands because I assumed they'd be treated as structural paths, but maybe they are not, and shouldn't be mentioned? In sum, I want the models to be the same across groups except for the first order indicator error variances and the second order factor variances. The only other thing I can think of is that perhaps some factor intercepts need to be released, but I thought they were free by default.
 Linda K. Muthen posted on Tuesday, April 12, 2011 - 8:39 pm
Please send the output and your license number to support@statmodel.com. It is impossible to understand what you are doing without seeing the full picture.
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