Abstract
A multiple linear-regression analysis of development at ages 4 and 5 yr. is reported. Ss were drawn from a large birth cohort born in 1966. The study examined the role of maternal traits, environmental factors, and biological data from the perinatal period, as predictors of physical growth and mental development. The findings showed that two aggregates of environmental data, one representing the micro-environment of mother and child, the other the macro-environment of society, emerged as significant influences on development at ages 4 and 5. A biological model based on early developmental data emerged as a comparatively significant influence on physical growth.
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