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Eager to Learn: Educating our Preschoolers
TABLE 4–1 Longitudinal Studies
Researcher
Age Group
Ratio
Group size
Duration
Abecedarian Project (Campbell and Ramey, 1994)
Infants,
1:3
14
5 years
preschool
1:6
12
Brookline Early Education Project (Hauser-Cram et al., 1991)
Infants,
1:1
5 years
preschool
1:6
18
Early Childhood Education Project (Sigel et al., 1973; Cataldo, 1978)
2–3 years
1:7
22
3 years
Early Training Project (Gray et al., 1982)
Preschool
1:5
20
2 or 3 years
Family Development Research Program (Honig and Lally, 1982)
Infants, preschool
1:4
8
5 years
Harlem Training Project (Palmer, 1983)
Preschool
1:1
NA
1–2 years
Infant Health and Development Program (Ramey et al., 1992; Infant Health and Development Program Consortium, 1990)
1–2 years
1:3
6
3 years
2–3 years
1:4
8
Milwaukee Project (Garber, 1988)
2 years
1:2
?
6 years
3 years
1:3
preschool
1:7
Perry Preschool Project (Schweinhart and Weikart, 1993)
Preschool
1:5
20–25
2 years
Project CARE (Wasik et al., 1990)
Infants,
1:3
14
5 years
preschool
1:6
12
SOURCES: Data from Frede (1998) and Lazar et al. (1977).
