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Mplus Discussion > Growth Modeling of Longitudinal Data >
 Daniel Rodriguez posted on Tuesday, September 18, 2007 - 10:42 am
Hello, I am centering an independent variable about the grand mean and the result is a positive effect of my variable (ADHD-inattention) on nicotine dependence trend. The effect is positive. How do I interpret this? is it a unit change from the grand mean? However, as one can be below or above the grand mean, is it a unit change in the positive direction?
 Linda K. Muthen posted on Thursday, September 20, 2007 - 11:53 am
Centering does not change the interpretation. For a one unit change in ADHD, nicotine dependence increases beta.
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