Table 4.

Regression model for expressive vocabulary across all participants (level 2-analysis).

	B	SE	t	p
Group 1
Intercept	−0.250	3.805	−0.66	0.95
Trend	0.200	1.170	0.171	0.87
Level	1.697	2.693	0.630	0.53
Slope	2.464	1.188	2.075	<0.05
Group 2
Intercept	2.500	3.005	0.832	0.41
Trend	0.300	0.791	0.379	0.71
Level	7.231	2.437	2.966	<0.01
Slope	2.379	0.814	2.924	<0.01
Group 3
Intercept	5.311	3.326	1.597	0.12
Trend	0.276	0.405	0.681	0.50
Level	3.784	1.611	2.349	<0.05
Slope	1.668	0.429	3.883	<0.001
Overall
Intercept	3.456	2.229	1.550	0.12
Trend	0.140	0.402	0.349	0.73
Level	4.086	1.369	2.985	<0.01
Slope	2.259	0.417	5.415	<0.001