Table 1.

Weighted Means, Proportions, and Standard Deviations

	Full Sample		More Self-Regulated		Less Self-Regulated		t-Test
Variable Description	Mean	SD	Mean	SD	Mean	SD	Significancea
Externalizing (4)	15.24	3.42	14.78	3.14	17.10	3.87	<.001
Externalizing (6)	15.23	3.54	14.95	3.40	16.66	4.00	<.001
Externalizing (8)	15.31	3.62	15.08	3.53	16.59	4.07	<.001
Externalizing (10)	15.24	3.64	15.09	3.56	16.33	3.96	<.001
Mother’s education	13.00	2.38	12.78	2.40	12.00	2.32	<.001
Female	0.49	0.50	0.50	0.50	0.50	0.50	ns
Trouble soothing	1.62	0.99
Gets Upset	1.40	0.85
Demanding	2.54	1.16
Low self-regulation	5.31	2.40
PPVT	48.61	18.21	45.85	18.67	39.91	17.74	<.001
Alcohol	3.78	4.91	3.52	4.64	3.44	4.86	ns
Drug use	0.60	0.49	0.56	0.50	0.52	0.50	ns
Harsh parenting	0.43	0.50	0.49	0.50	0.55	0.50	<.05
Maternal work hours (4)	15.05	14.57	14.45	14.00	13.93	14.47	ns
Maternal work hours (6)	18.03	16.05	17.19	15.48	16.70	15.98	ns
Maternal work hours (8)	20.94	17.00	20.53	16.74	20.26	17.52	ns
Family income (4)	10.36	0.99	10.22	0.98	9.92	1.06	<.001
Family income (6)	10.45	1.04	10.33	0.98	10.00	1.08	<.001
Family income (8)	10.51	1.03	10.39	1.00	10.09	1.08	<.001
Residential father (4)	0.76	0.43	0.71	0.45	0.61	0.49	<.001
Residential father (6)	0.72	0.45	0.68	0.47	0.56	0.50	<.001
Residential father (8)	0.69	0.46	0.64	0.48	0.54	0.50	<.001
Stepfather (4)	0.07	0.26	0.09	0.29	0.06	0.24	ns
Stepfather (6)	0.08	0.27	0.09	0.28	0.10	0.29	<.05
Stepfather (8)	0.10	0.30	0.10	0.30	0.10	0.30	ns
Number of children (4)	2.30	1.09	2.40	1.14	2.39	1.25	ns
Number of children (6)	2.35	1.15	2.48	1.18	2.42	1.28	ns
Number of children (8)	2.39	1.19	2.52	1.23	2.39	1.32	<.05
N	4967		3643		1324

^aResult of a t -test comparing children who are more self-regulated with those who are less self-regulated.