Cross-lagged-model PreviousNext
Mplus Discussion > Structural Equation Modeling >
Message/Author
 Carl Philipp Schröder posted on Friday, January 22, 2016 - 7:59 am
Hi there,
i'm trying to build a cross-lagged-model, but the output always says:

WARNING: THE LATENT VARIABLE COVARIANCE MATRIX (PSI) IS NOT POSITIVE
DEFINITE. THIS COULD INDICATE A NEGATIVE VARIANCE/RESIDUAL VARIANCE FOR A
LATENT VARIABLE, A CORRELATION GREATER OR EQUAL TO ONE BETWEEN TWO LATENT
VARIABLES, OR A LINEAR DEPENDENCY AMONG MORE THAN TWO LATENT VARIABLES.
CHECK THE TECH4 OUTPUT FOR MORE INFORMATION.
PROBLEM INVOLVING VARIABLE NAT3.

I see in the TECH4 Output, that the correlation of 4 latent variables are >1. What can i do? Thanks
 Bengt O. Muthen posted on Friday, January 22, 2016 - 4:25 pm
This often means that too much of the observed variable correlations gets channeled through the factors. That can have two reasons: Cross-loadings that should not be fixed at zero or residual covariances that should not be zero. Look for the need to modify that using Modindices.
 Eleni Georganta posted on Wednesday, February 17, 2016 - 8:32 am
Hello!

I am new to Mplus and trying to test an autoregressive model with cross-lagged effects (5 varibales at three points in time).

I get this ERROR:
One or more variables have a variance greater than the maximum allowed of 1000000. Check your data and format statement or rescale the variable(s) using the DEFINE command.
Do you have any suggestions?

Thank you!
 Linda K. Muthen posted on Wednesday, February 17, 2016 - 3:39 pm
Please send the output, data set, and your license number to support@statmodel.com.
Back to top
Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: