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 Mohamed Abou-Shouk posted on Wednesday, March 30, 2011 - 4:11 pm
Hi,

I am running CFA, i got the message that 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.
i also found the that THE SAMPLE CORRELATION OF Y2 AND Y1 IS -1.000

How can i sort this out, do i have to write a certain command? please advise.

Thanks,
 Linda K. Muthen posted on Wednesday, March 30, 2011 - 7:01 pm
This means y1 and y2 are not statistically distinguishable and both cannot be used. The model is inadmissible.
 Liz Woodruff posted on Saturday, April 02, 2011 - 8:12 pm
how many indicators do you have?
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