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Mplus Discussion > Structural Equation Modeling >
 JackeJR posted on Tuesday, May 10, 2016 - 12:59 am
I am developing a MIMIC model and would like to clarify on the steps to develop the model.

I have the following model and I want to test for measurement invariance for AGE:

Step 1
f1 BY y1-y4;
f2 BY y5-y8;
f3 BY y9-y12;
f1-f3 ON AGE@0;
y1-y12 ON AGE@0;


Step 2
Examine the modification indices and add 1 path at a time.

1. Is what I outlined correct? OR should we be adding all the direct and indirect effects and see which is significant?

2. For Step 2 in what order should I be adding the paths? Indirect then direct or vice versa?

Do I
a) build up the model incrementally i.e. add path 1 -> check chi-sq diff -> if better, add paths 1 and 2 and repeat until all paths have been added OR

b) should I add each of the path in the modification index separately, do a chi-sq difftest to determine which makes significant changes and then have a final model with all the significant paths?
 Bengt O. Muthen posted on Friday, May 13, 2016 - 1:48 pm
Start with the model that you think is closest to the best model. Then check the modindices.
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