Minimum time points needed for LCGA PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
 Sara Douglass posted on Monday, January 16, 2012 - 12:47 pm

I have read from various sources that a minimum of 4 time points is recommended for GMM, but have not found a consistent answer with regards to LCGA - if the model is identified with 3 time points, is there still a reason for having a minimum of 4 time points?

Thank you!
 Linda K. Muthen posted on Tuesday, January 17, 2012 - 2:04 pm
With LCGA, there are fewer model parameters so you could use fewer time points as far as model identification goes. However, with less than four, I would think it might be hard to see much of a trend.
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