Table 4.

Double-quadratic multiphase model estimates for Fox and Geese data

Parameter	Notation	Est.	SE	p
	Growth Trajectory Fixed Effects
Minimum	γ 10	4.50	0.21	<.01
Change Onset	γ 20	8.66	2.26	<.01
Maximum	γ 30	11.30	0.39	<.01
Change Offset	γ 40	24.02	1.51	<.01
	Random Effects
Change Onset Variance	τ 22	45.50	17.86	<.01
Maximum Variance	τ 33	19.94	2.32	<.01
Change Offset Variance	τ 44	9.09	6.59	.01
Max., Onset Correlation	Corr(u2i, u3i)	0.42	0.18	.03
Onset, Offset Correlation	Corr(u2i, u4i)	−0.14	0.16	.41
Max., Offset Correlation	Corr(u3i, u4i)	−0.89	<0.01	<.01
	Within-Person Residual Variance
Residual Variance	σ 2	10.79	0.86	<.01

Note: p-values are obtained from a t-distribution with the default degrees of freedom computed as number of upper-level units (17 children) minus the number of estimated random effects (3), which is 14.