Sample and estimated means PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 GP posted on Wednesday, September 02, 2009 - 10:00 pm
I'm running LCGA with two classes and 6 timepoints with data values ranging from 17 to 92.
The plot of the sample and estimated means shows that these means are far apart at timepoint 1 (about 20 points), but not at later timepoints.
There is no missing data at timepoint 1, while there is afterwards. I'm a little puzzled, and I would like to hear your thoughts.
Thank you in advance.
 Bengt O. Muthen posted on Wednesday, September 02, 2009 - 11:14 pm
Perhaps you use a linear growth model, but should use a quadratic or piecewise model. In some studies, such as with mental health, the first time point often has a much different value than subsequent time points which cannot be well approximated by linear development.
Back to top
Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: