Seccyd began as the study of early child care in 1991 working with more than 1300 children and their families the researchers analyzed how different child care arrangements related to measurements of the childrens health behavior school performance and other indicators of development in infancy early childhood middle childhood and middle adolescence. Some non maternal care by 6 months of age results from the nichd study of early child care and youth development show that in its demographically and ethnically diverse sample of more than 1000 children the average child spent 27 hours a week in non maternal care over the irst 4 1 2 years of life during the childrens. Nichd early child care research network early child care and childrens development in the primary grades results from the nichd study of early child care american educational research journal 2005c 43537 570 nichd early child care research network mothers and fathers support for child autonomy and early school achievement. The nichd study of early child care and youth development is a critically important milestone in the science of human development the results compellingly illustrate the powerful roles of child care experience and family dynamics in shaping human adaptation and development the results also offer a somber warning on the developmental . The national institute of child health and human development nichd study of early child care begun in 1990 investigates whether and how much early child care affects infants and young childrens social emotional physical and cognitive development
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