Table 108.

Percentage of children demonstrating specific cognitive and motor skills at about 9 months of age, by child's age at assessment: 2001-02

Specific ability	Percent of children 8 through 10 months old								Percent of children 11 through 13 months old								Percent of children 14 through 22 months old
	Total		8 months		9 months		10 months		Total		11 months		12 months		13 months
1	2		3		4		5		6		7		8		9		10
Survey population percentage distribution	72.2	(0.98)	16.1	(0.82)	34.8	(0.71)	21.3	(0.61)	20.9	(0.79)	10.6	(0.49)	6.2	(0.37)	4.1	(0.30)	6.5	(0.50)
Cognitive abilities
Explores objects in play	99.2	(0.03)	98.7	(0.06)	99.2	(0.02)	99.4	(0.03)	99.8	(0.02)	99.7	(0.04)	99.9	(0.01)	100.0	(0.01)	100.0	(0.01)
Explores with purpose	87.8	(0.38)	79.6	(0.75)	88.0	(0.31)	93.8	(0.27)	97.4	(0.14)	96.4	(0.26)	98.8	(0.08)	99.4	(0.05)	99.3	(0.10)
Babbles	46.7	(0.41)	37.9	(0.48)	45.2	(0.33)	55.8	(0.53)	72.1	(0.43)	64.9	(0.57)	76.7	(0.63)	84.1	(0.57)	89.0	(0.62)
Early problem solving	3.4	(0.11)	1.4	(0.08)	2.7	(0.07)	6.0	(0.21)	17.2	(0.46)	11.2	(0.49)	20.1	(0.77)	28.4	(0.98)	46.4	(1.47)
Uses words	0.5	(0.02)	0.2	(0.01)	0.4	(0.01)	1.0	(0.05)	5.0	(0.25)	2.7	(0.23)	5.9	(0.42)	9.9	(0.66)	26.7	(1.42)
Motor abilities
Eye-hand coordination	90.7	(0.13)	87.7	(0.25)	90.6	(0.16)	93.1	(0.13)	96.4	(0.11)	95.3	(0.16)	97.1	(0.16)	98.2	(0.17)	99.0	(0.09)
Sitting	93.4	(0.13)	90.4	(0.28)	93.4	(0.16)	95.7	(0.13)	98.2	(0.08)	97.4	(0.13)	98.6	(0.12)	99.3	(0.12)	99.6	(0.06)
Prewalking	73.2	(0.40)	63.4	(0.75)	72.9	(0.49)	81.1	(0.43)	91.4	(0.33)	88.1	(0.52)	93.6	(0.47)	96.4	(0.53)	98.2	(0.22)
Independent walking	18.5	(0.37)	10.4	(0.44)	16.8	(0.41)	27.4	(0.63)	55.2	(1.06)	42.9	(1.33)	62.2	(1.77)	76.4	(1.93)	89.1	(1.04)
Balance	1.1	(0.04)	0.5	(0.03)	0.9	(0.03)	1.9	(0.10)	10.1	(0.50)	5.0	(0.36)	12.6	(0.95)	19.8	(1.34)	43.1	(1.86)

NOTE: This table is based on a survey that sampled children born in 2001 and was designed to collect information about them when the children were about 9 months of age (i.e., 8 to 10 months). As shown in the table, some children were older than this, although only 6.5 percent were over 13 months of age. Standard errors appear in parentheses. SOURCE: U.S. Department of Education, National Center for Education Statistics, Children Born in 2001: First Results From the Base Year of the Early Childhood Longitudinal Study, Birth Cohort. (This table was prepared February 2006.)