Factors with only one variable PreviousNext
Mplus Discussion > Confirmatory Factor Analysis >
 Ray posted on Wednesday, March 18, 2009 - 8:06 am
I apologize for this, as I know very little about SEM so far. I did a EFA and discarded a couple variables. However, because of this, one factor now only has one variable associated with it:

X1 by Y1 Y2 Y3
X2 by Y4 Y5
X3 by Y6

How does one manage this in MPlus? Does the X3 factor simply get omitted from the analysis?
 Thuy Nguyen posted on Wednesday, March 18, 2009 - 1:35 pm
If you have only one factor indicator, just use the observed variable in the analysis. A factor with one indicator is identical to the observed variable.
 Ray posted on Thursday, March 19, 2009 - 7:13 am
So how would I write that in the model section of a CFA (based on the above example)? Like this?

X1 by Y1 Y2 Y3
X2 by Y4 Y5
 Bengt O. Muthen posted on Friday, March 20, 2009 - 11:01 am
Yes, you can write it like that. And, say for instance:

y6 ON....
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