Mid-point intercept in growth curve a... PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
 Joy Choi posted on Thursday, February 07, 2013 - 10:42 pm
I am working on my thesis, which predicting externalizing behavior problem at 7 different time points (Kindergarten to grade 6). My advisor wants me to look at mid-point intercept and linear slope in growth curve analysis. And, also we want to predict last point in time, more or less switching the predicted intercept from mid-pont to last time point.

Thus, I runned a simple growth curve modeling, which has
i s | bexk@0 bexg1@1 bexg2@2 bexg3@3 bexg4@4 bexg5@5 bexg6@6;
i s on ind;

I was wondering should I run differently in order to get mid-point intercept
OR just read grade3 (which is the mid point of these 7 time points) intercept estimate under standardization model results section?

Would you help me, please? =)
 Linda K. Muthen posted on Friday, February 08, 2013 - 12:05 pm
The intercept growth factor is defined by the time point that is zero. To make this be the mid-point, subtract 3 from all of the time scores so they will be:

i s | bexk@-3 bexg1@-2 bexg2@=1 bexg3@0 bexg4@1 bexg5@2 bexg6@3;
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