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Mplus Discussion > Structural Equation Modeling >
 jumi lee posted on Monday, July 16, 2012 - 10:17 am
I would like explore how a SEM model is different between at the beginning of a semester and the end of a semester. So, I will administrate the same survey to same people at different time points (beginning, end). In this case, can I use a structured mean analysis in SEM? If so, to make a measurement model before comparing two models, do I have to have all data from both beginning and end of a semester?
If this is wrong, what SEM analysis method should be used?
Thank you in advance for your help.
 Linda K. Muthen posted on Tuesday, July 17, 2012 - 11:04 am
You would need to have both sets of data. You would need to establish measurement invariance across time before comparing factor means or other structural parameters.
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