TABLE 1—

Descriptive Statistics of 414 Preschool Children in Chicago School Readiness Project Trials, 2004–2006

	Fall Measurement, % or Mean (SD)	Spring Measurement, Mean (SD)
Child
Executive functioning	0.01 (0.83)	0.07 (0.81)
Effortful control	0.02 (0.67)	0.04 (0.65)
Attention	2.11 (0.78)	2.35 (0.68)
Impulse control	2.36 (0.68)	2.42 (0.63)
PPVT English	0.44 (0.16)	0.57 (0.18)
PPVT Spanish	0.45 (0.17)	0.49 (0.16)
Early math skill English	0.41 (0.19)	0.54 (0.20)
Early math skill Spanish	0.33 (0.18)	0.48 (0.22)
Boy	49
African American race/ethnicity	66
Hispanic race/ethnicity	26
Treatment	51
Age, mo	50.36 (6.72)
Caregiver
Income-to-needs ratio	0.70 (0.60)
Completed < 12th grade	25
High-school diploma or GED	37
Some college	26
≥ bachelor’s degree	8
Living with partner	41
Mental health problem	0.70 (0.74)

Note. GED = general equivalency diploma; PPVT = The Peabody Picture Vocabulary Test.