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Mplus Discussion > Confirmatory Factor Analysis >
 Rules Comm posted on Thursday, May 06, 2010 - 3:33 pm
This is one factor CFA.

The results of the model are generally good. CFI>.96 and SRMR<.05.

Only the StdYX of one observed variable (MNDAAA9) is greater than 1, while the rest are smaller than 1. But I do not think this is a problem

But there is a message saying: THE RESIDUAL COVARIANCE MATRIX (THETA) IS NOT POSITIVE DEFINITE. I found the estimate of residual variance for the variable (MNDAAA9) is negative (-0.011), which is small and not statistically significant.

Then I follow the guide in some of the discussions in the forum and add a line MNDAAA9@0 in the model command to handle this problem. It does not work. All the model fit indices are weird and the StdYX of mndaaa9 equal 1.

What could be the reason that this strategy does not work? Is there any other strategy that I can follow? Thanks.
 Linda K. Muthen posted on Thursday, May 06, 2010 - 3:40 pm
Please send the two outputs and your license number to
 Rules Comm posted on Friday, May 07, 2010 - 2:36 pm
After some adjustment, I got new results.

In the new model, which includes MNDAAA9@0, the model fit indices are NORMAL, but the StdYX of mndaaa9 equal 1. My only question is how can I explain this (I have to use StdYX in my paper)?

 Linda K. Muthen posted on Saturday, May 08, 2010 - 7:38 am
It's not possible to say anything meaningful without seeing the full output.
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