ULS vs WLSMV PreviousNext
Mplus Discussion > Exploratory Factor Analysis >
Message/Author
 Daniel E Bontempo posted on Friday, October 08, 2004 - 6:14 pm
I get the following message when doing categorical EFA with the ULS estimator:

THE INPUT SAMPLE CORRELATION MATRIX IS NOT POSITIVE DEFINITE. THE ESTIMATES GIVEN BELOW
ARE STILL VALID.

However, the solution does not have a strong resemblence to what I get with WLSMV. The eigenvalue range looks about the same, but the PROMAX correlation matrix is very different. Also a number of items jump factors or switch signs.

The WLSMV yeilds a factor structure that compares favorably to prior EFA work with this instrument. How should I think about these ULS vs WLSMV solution differences?

Thanks
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