Biological and Ecological Influences on Development at 12 Months of Age

摘要

A multivariate analysis of development at the end of first year of life has been reported. The study analyzed the contribution of biological data, and two aggregates of environmental data to the study of development at age 12 months. Data consisted of materials in the histories of 353 children at 12 months of age. The case histories were drawn from a prospective longitudinal study of development in the preschool years.