. Author manuscript; available in PMC: 2020 Oct 1.

Published in final edited form as: Child Neuropsychol. 2019 Feb 4;25(7):943–963. doi: 10.1080/09297049.2019.1569608

Table 4.

Parameters of trajectories of vocabulary growth across all FT and PT children (n = 132) in unconditional models. Intercept estimates (SE) indicate predicted vocabulary size at 30 months of age; Linear and quadratic estimates (SE) indicate rate and acceleration of developmental change, respectively.

	Model 1: Intercept only	Model 2: Linear	Model 3: Quadratic
Model fit (−2LL)	7667.6	6858.7	6629.6
No. parameters	3	6	10
Fixed effects
Intercept	370.9 (22.8)^**	1026.6 (53.1)^**	1112.2 (53.5)^**
Linear	--	74.7 (3.8)^**	119.6 (8.3)^**
Quadratic	--	--	3.1 (0.5)^**
Random Effects
Within person	259553.3 (16399.1)^**	26415.6 (2364.2)^**	8695.8 (1045.2)^**
Intercept	--	330562.9 (45647.6)^**	339398.4 (45161.2)^**
Linear	--	1479.3 (227.1)^**	6797.3 (1112.7)^**
Quadratic	--	--	20.8 (3.8)^**

Note:

p < .05,

^**

p < .01