Growth factor covariances with quadra... PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
 Gareth posted on Thursday, July 15, 2010 - 1:40 am
Example 6.16 (two-part growth model) in the user's guide recommends fixing growth factor covariances to zero. What would you recommend if adding a quadratic factor? For example:

iu su qu | bin1@0 bin2@.1 bin3@.2 bin4@.3;
iy sy qy | cont1@0 cont2@.1 cont3@.2 cont4@.3;
su-qu@0; iu WITH sy-qy@0;
 Linda K. Muthen posted on Thursday, July 15, 2010 - 8:01 am
This is not a recommendation. It is a way to reduce the number of dimensions of integration from three to one.
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