Structural invariance test for multil... PreviousNext
Mplus Discussion > Confirmatory Factor Analysis >
 Simon Goldberg posted on Thursday, February 21, 2019 - 2:52 pm
I am conducting a multilevel CFA and would like to test for structural invariance in my measure across two time points. The data set includes observations of therapists on an 11 item scale at two time points. Not all of the therapists are represented at both time points.

I have been able to get the multilevel CFA to run. However, when I try to add in time (pre- or post-treatment) with the Grouping statement to test for measurement invariance I receive an error message:

Cluster ID cannot appear in more than one group.
 Bengt O. Muthen posted on Friday, February 22, 2019 - 11:58 am
Having the same individuals measured twice does not constitute 2 groups because the observations are not independent over time. Don't use Grouping. Invariance across time can still be tested.
 Simon Goldberg posted on Friday, February 22, 2019 - 1:19 pm
That makes sense. Thank you, Prof Muthen!
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