I am working on my diploma thesis and was advised to use MPlus to do a CFA on my longitudinal data. After quite some literature on the topic, I didnīt make much progress, though. And now hope anyone here can help me, maybe give me a syntax to go with and explaing what it is that I have to do. (sorry for being such a newbie, but this kind of statistics is quite new for me).
I have two variables from my data (say X and Y). Each variable was queried 14 times over a week (morning and evening). So I have X1m through X7m, and X1e through X7e and the same for Y. With those I want to confirm a little modell which consists of 2 factors (A and B) where A comprises all the morning variables (1m through 7m) and B all the evening variables (1e through 7e).
I read about structural equation models (LS(T) models) and Multilevel models. First of all I donīt know which one to use and second, I donīt know how the syntax should look like for either one. The examples in the book donīt give much away for just this case.
The Topic 4 course handout and video on the website covers multiple indicator growth starting at Slide 78. This shows how to test for measurement invariance over time and how to estimate a growth model for the factors.
You might find a wider range of help on a general discussion forum like SEMNET.