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Mplus Discussion > Categorical Data Modeling >
 Anonymous posted on Tuesday, November 30, 2004 - 10:15 am
Dear Dr. Muthen,
I am running a single group CFA with categorical observed indicators. My ultimate goal is to do a multiple group comparison. But first, I am trying to fit my model for each group. To do so, in mplus I just wrote Y ON X1-X5 and ran the model for each group seperately. The results produced factor loadings, thresholds, factor variance, and residual variance. My questions :
1- Do I need to constrain my thresholds in a single group CFA?
2- I did not get scale factors in my single group CFA. Do I need to specify scale factros and/or maybe constrain them?
3- In the output, I also did not see the factor mean. Shoud I specify it in my model?
In general, could you please let me know what should I specify in my model for a single group CFA with categorical outcomes?
 Linda K. Muthen posted on Tuesday, November 30, 2004 - 10:51 am
You should use the BY statement to specify a CFA model. See Example 5.2 in the Mplus User's Guide.

1. No.
2. No. They are fixed at one as the default.
3. Factor means are zero.
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