Table 3 .

Mean and variance of initial score and rate of change of unconditional model

Variables	Mean		Variance
	Estimate	S.E.	Estimate	S.E.
Initial Score	1.316***	0.017	0.062***	0.006
Linear Change Rate	0.016*	0.007	0.004*	0.002
Quadratic Change Rate	− 0.020***	0.002	0.003*	0.001

*p < .05, ***p < .001