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
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.
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?