Factor loading signs flipped PreviousNext
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Message/Author
 Li Lin posted on Thursday, February 18, 2010 - 10:45 am
I am repeating an EFA using the same data and the same Mplus code, but in different Mplus versions. The output were identical, except some factors had its factor loadings sign flipped(absolute values didn't change). What caused this change in the sign? Would this be a problem for using the EFA analysis result? Please help. Thanks!

Part of the output:
Mplus VERSION 5 -
QUARTIMIN ROTATED LOADINGS
1 2
________ ________
SFGLO01 -0.419 -0.444
SFDES01 -0.895 -0.028
SFDES02 -0.909 0.133
SFDES03 -0.866 0.345
SFDES04 -0.721 -0.193
RECDES05 -0.597 -0.419
RECDES06 -0.024 -0.555
RECDES07 -0.088 -0.727
SFDES08 0.217 -0.413
...

Mplus VERSION 5.21 -
QUARTIMIN ROTATED LOADINGS
1 2
________ ________
SFGLO01 0.419 0.444
SFDES01 0.895 0.028
SFDES02 0.909 -0.133
SFDES03 0.866 -0.345
SFDES04 0.721 0.193
RECDES05 0.597 0.419
RECDES06 0.024 0.555
RECDES07 0.088 0.727
SFDES08 -0.217 0.413
...
 Linda K. Muthen posted on Thursday, February 18, 2010 - 11:12 am
If all of the signs in a column change, this is not a problem. There was probably a slight algorithm change between Version 5 and 5.21. It just changes the factor meaning from, for example, inability to ability.
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