Key points are not available for this paper at this time.
Frantisek Mandys, Conor V. Dolan, Peter C. M. Molenaar, Two Aspects of the Simplex Model: Goodness of Fit to Linear Growth Curve Structures and the Analysis of Mean Trends, Journal of Educational and Behavioral Statistics, Vol. 19, No. 3 (Autumn, 1994), pp. 201-215
Mandys et al. (Sat,) studied this question.