A parameterization problem PreviousNext
Mplus Discussion > Categorical Data Modeling >
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 cchien posted on Wednesday, April 21, 2010 - 3:58 pm
Hi. Previously I used a 3-factor EFA result in a CFA framework with a survey data set, and everything was fine. While using a 4-factor EFA result in a CFA framework, M-plus showed an error message:

*** ERROR in MODEL command
Variances for categorical outcomes can only be specified using
PARAMETERIZATION=THETA with estimators WLS, WLSM, or WLSMV.
Variance given for: RSVAR24

I alternatively added the statement PARAMETERIZATION=THETA in my program, but the output was mostly different from the output with 3 factors. My question is, why can the default PARAMETERIZATION=DELTA not be used in 4 factors case? Why are the two outputs of parameterization methods different? Thanks for any answer or information.
 Linda K. Muthen posted on Wednesday, April 21, 2010 - 4:08 pm
It is not that Delta cannot be used with four factors. It is that you can't mention a variance for a categorical variable. The same thing would happen for three factors. You should remove RSVAR24 from the MODEL command. Or if it is a factor indicator, you should have it as part of a BY statement. If you can't see the problem, send the full output and your license number to support@statmodel.com.
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