Ling Ning posted on Tuesday, April 04, 2017 - 10:16 am
Dear Prof. Muthen,
I am estimating a piecewise growth curve model and try to use fit indices to identify model misfit but the literature suggested that I can't use the CFI and TLI directly from Mplus output because the default null models used in Mplus is not adequate (Hancock, G. R., & Mueller, R. O. , 2010). Instead I need to estimate an adequate null model and then used the values to calculate CFI and TLI. But the question is my data is not normal and I used estimator = MLR, in which case, can I directly used the chi-square value generated from the MLR estimator and plug them into the formula to calculate CFI and TLI? I understand it is ok to use SB chi-square from MLM estimator to do the calculation but not sure if it is the same with the MLR estimator.
Ling Ning posted on Tuesday, April 04, 2017 - 1:35 pm
The default null models used in Mplus is not adequate for any growth curve model(Hancock, G. R., & Mueller, R. O. , 2010, pp.196)