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Li, Weilin; Farkas, George; Duncan, Greg J.; Burchinal, Margaret R.; Vandell, Deborah Lowe – Developmental Psychology, 2013
The effects of high- versus low-quality child care during 2 developmental periods (infant-toddlerhood and preschool) were examined using data from the National Institute of Child Health and Human Development Study of Early Child Care. Propensity score matching was used to account for differences in families who used different combinations of child…
Descriptors: Child Care, Educational Quality, Child Development, Infants
Kaplan, Jay Bernard – 1974
Fifth and sixth grade students from the State College Area School District (Pennsylvania) participated in a 5-day resident outdoor education program to investigate the effectiveness of such a program on the development of cognitive learning processes. Students were divided into experimental and control groups of one fifth and one sixth grade class…
Descriptors: Academic Achievement, Cognitive Development, Comparative Testing, Data Analysis