

Midpoint intercept in growth curve a... 

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Joy Choi posted on Thursday, February 07, 2013  4:42 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 midpoint 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 midpont 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 midpoint 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? =) 


The intercept growth factor is defined by the time point that is zero. To make this be the midpoint, 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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