Table 4.

Group × Time Interaction and Main Effects of the Getting Ready Intervention

Outcome	Estimate	SE	df	t value	p value	ES
PLS-4 Expressive Communicationa
Intercept	101.940	1.800	205.670	56.780	<.001
Education Risk	−10.250	2.260	190.860	−4.550	<.001
Other Language	−10.790	2.180	196.590	−4.950	<.001
Child Gender	−0.060	0.093	325.915	−0.644	.520
Time	0.099	0.077	115.844	1.276	.205
Group (T-C)b	5.020	2.190	187.780	2.290	.020
Time (T-C)c	−0.098	0.106	116.697	−0.925	.357	−0.64
TROLLd Language Use
Intercept	2.610	0.070	221.040	38.590	<.001
Education Risk	−0.250	0.090	189.980	−2.950	<.001
Other Language	−0.200	0.080	195.630	−2.460	.010
Child Gender	0.003	0.004	307.116	0.891	.373
Time	0.046	0.003	158.936	13.139	<.001
Group (T-C)	−0.110	0.080	200.750	−1.300	.200
Time (T-C)	0.014	0.005	147.599	2.967	.004	1.11
TROLL Reading
Intercept	1.851	0.088	207.551	21.044	<.001
Education Risk	0.021	0.009	194.745	2.447	.015
Other Language	−0.064	0.057	190.764	−1.107	.270
Child Gender	0.004	0.003	319.313	1.067	.287
Time	0.045	0.003	145.158	14.323	<.001
Group (T-C)	−0.065	0.053	197.168	−1.219	.224
Time (T-C)	0.015	0.004	138.326	3.617	.000	1.25
TROLL Writing
Intercept	1.420	0.050	293.730	28.140	<.001
Parent Education	−0.140	0.070	283.690	−2.120	.030
Other Language	−0.070	0.070	277.160	−1.040	.300
Child Gender	0.008	0.004	330.006	1.799	.073
Time	0.063	0.004	164.521	14.762	<.001
Group (T-C)	−0.050	0.060	281.410	−0.920	.360
Time (T-C)	0.017	0.006	154.481	3.023	.003	0.93

Note.

^aPreschool Language Scale-4^th ed., Expressive Communication scale. Standard scores with M = 100; SD = 15

^bGroup (T-C) is the difference between treatment and control groups in intercepts

^cTime (T-C) is the difference between treatment and control groups in slope means (the time*group interaction coefficient)

^dTeacher Rating of Oral Language and Literacy. Raw scores on a 4-point Likert scale (1 = never, limited; 4 = often, proficient)