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

Contexts of Elementary and Secondary Education: Tables

Early Development of Children

Table 35-2. 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	56	92	95	79	31	6
Age
Less than 10 months	54	91	93	73	18	1
11–13 months	61	96	98	91	55	10
14–22 months	70	99	100	98	89	43
Sex
Male	56	92	95	79	31	6
Female	56	92	95	78	31	6
Race/ethnicity¹
American Indian	59	94	96	83	42	12
Asian/Pacific Islander	57	93	95	80	33	6
Black	58	93	96	82	36	7
White	56	92	95	78	30	6
Hispanic	56	92	94	78	30	5
Birth weight²
Normal	57	93	95	79	31	6
Low	55	90	93	72	24	4
Very low	51	84	86	59	14	2
Poverty status
Poor	57	93	95	79	32	6
Nonpoor	56	92	95	78	30	6
Mother’s education
Less than high school	57	93	95	79	32	6
High school diploma or equivalent	57	93	95	79	32	6
Some college	57	93	95	79	31	6
Bachelor’s degree or higher	56	92	94	76	27	5
Family type
Two parents, with other siblings	56	92	94	77	29	5
Two parents, without other siblings	57	93	95	79	31	6
One parent, with other siblings	57	93	95	81	34	6
One parent, without other siblings	58	94	96	83	36	7
Primary language spoken in the home
English	57	93	95	79	31	6
Other than English	56	92	94	77	28	5
Number of family risk factors³
Zero	56	92	95	78	29	6
One	57	93	95	80	33	6
Two or more	56	92	95	79	31	6

¹American Indian includes Alaska Native, Black includes African American, Pacific Islander includes Native Hawaiian, and Hispanic includes Latino. Race catagories exclude Hispanic origin unless specified .
²Normal birth weight is more than 5.5 pounds; low birthweight is more than 3.3 to 5.5 pounds; and very low birthweight is 3.3 pounds or less.
³Family risk factors include living below the poverty level, living in a household where the primary language was not English, having a mother whose highest education was less than a high school diploma or equivalent, and living in a single-parent household. See supplemental note 1 for more information on mother’s education and poverty.
NOTE: While the Early Childhood Longitudinal Study, Birth Cohort (ECLS–B) was designed to collect information on children about 9 months of age (i.e., 8 to 10 months), children were assessed as young as 6 months and as old as 22 months. Seventy-two percent of the children were between 8 and 10 months at the time of the assessment, and 84 percent were between 8 and 11 months. The assessment included here is the Bayley Short Form–Research Edition (BSF–R). For more information on the BSF–R and ECLS–B, see supplemental note 3.
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).

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