Standard errors for the children’s mean motor scale score at about 9 months of age and the percentage possessing specific motor skills, by child and family characteristics: 2001

Early Development of Children

Table S35-2. Standard errors for the children’s mean motor scale score at about 9 months of age and the percentage possessing specific motor skills, by child and family characteristics: 2001–02

		Percent
Child and family characteristic	Mean motor scale score	Eye-hand coordination	Sitting	Prewalking	Independent walking	Balance

Total	0.2	0.1	0.1	0.4	0.7	0.3
Age
Less than 10 months	0.1	0.1	0.1	0.4	0.4	#
11–13 months	0.2	0.1	0.1	0.3	1.1	0.5
14–22 months	0.4	0.1	0.1	0.2	1.0	1.8
Sex
Male	0.2	0.1	0.1	0.5	0.8	0.4
Female	0.2	0.2	0.1	0.5	0.8	0.4
Race/ethnicity<
American Indian	0.6	0.4	0.3	1.2	2.7	2.0
Asian/Pacific Islander	0.3	0.2	0.2	0.6	1.2	0.7
Black	0.3	0.2	0.2	0.6	1.4	0.7
White	0.2	0.2	0.2	0.6	0.9	0.5
Hispanic	0.2	0.2	0.2	0.7	1.1	0.5
Birth weight
Normal	0.2	0.1	0.1	0.4	0.7	0.4
Low	0.2	0.2	0.3	0.6	0.8	0.4
Very low	0.3	0.6	0.6	1.1	0.8	0.2
Poverty status
Poor	0.2	0.2	0.2	0.6	1.1	0.6
Nonpoor	0.2	0.1	0.1	0.4	0.8	0.4
Mother’s education
Less than high school	0.2	0.2	0.2	0.6	1.1	0.6
High school diploma or equivalent	0.2	0.2	0.2	0.7	1.1	0.6
Some college	0.2	0.2	0.2	0.6	1.0	0.5
Bachelor’s degree or higher	0.2	0.2	0.2	0.6	0.9	0.4
Family type
Two parents, with other siblings	0.2	0.2	0.2	0.5	0.8	0.5
Two parents, without other siblings	0.2	0.2	0.2	0.5	0.9	0.4
One parent, with other siblings	0.4	0.3	0.3	0.9	1.6	0.8
One parent, without other siblings	0.3	0.2	0.2	0.6	1.4	0.8
Primary language spoken in the home
English	0.2	0.1	0.1	0.4	0.8	0.4
Other than English	0.2	0.3	0.3	0.7	1.0	0.5
Number of family risk factors
Zero	0.2	0.2	0.2	0.5	0.9	0.4
One	0.2	0.2	0.2	0.5	1.0	0.5
Two or more	0.3	0.3	0.3	0.7	1.1	0.5

# Rounds to zero.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Early Childhood Longitudinal Study, Birth Cohort (ECLS–B), Restricted-Use File (NCES 2004–093), previously unpublished tabulation (January 2005).