Linear Growth Curve Model vs the Model in McArdle & Prindle (2008)

Posted by E. Bernardo on Dec 02, 2012; 4:45am
URL: http://spssx-discussion.165.s1.nabble.com/Linear-Growth-Curve-Model-vs-the-Model-in-McArdle-Prindle-2008-tp5716580.html

Hi all, The example of linear growth curve model discussed at http://www.amosdevelopment.com/video/growthcurve5/flash/growthcurve5b.html consists of four repeated measures y1, y2, y3 and y4.  Of course, the approach can be extended to latent variables.  Also, (I think) this linear growth curve model can be reduced to two measures only, pre and post measures, y1 and y2.  How is this reduced form different from the approach described in McArdle & Prindle (2008)? Reference: A latent change score analysis of a randomized clinical trial in reasoning training. McArdle, John J.; Prindle, John J. Psychology and Aging, Vol 23(4), Dec 2008, 702-719. doi:10.1037/a0014349 Special Section: Cognitive Plasticity in the Aging Mind. Thank you. Eins