Although epidemiological data provide evidence that early life experience plays a critical role in human development, the mechanism of how this works remains in question. Recent data from human and animal literature suggest that epigenetic changes, such as DNA methylation, are involved not only in cellular differentiation but also in the…

Developmental and life course studies of young adult identities have focused on 2 dimensions: subjective age and psychosocial maturity. This study examines the developmental synchrony of these 2 processes. In a longitudinal sample of young adults from Add Health (ages 18-22), a person-centered analysis of indicators of these dimensions identified…

Described is an empirical and rational inquiry into the formation of a small set of special or geometrical concepts of young children. The approach taken by the author is to attempt to specify intellectual growth in one particular area, a child's acquisition of diagonality, in such a way as to be representative. That is, to give a clean portrayal…

This study sought to determine whether a number of specific counting and numeration behaviors emerge within children in a fixed developmental sequence; at what point in the development of mathematical behavior the use of numerical representations normally appears; and what relationship holds between development of counting skills and development…

This single-volume resource provides detailed information on current large-scale and longitudinal research studies focusing on early childhood developmentthe situations and experiences of young American children. Twenty-eight studies are profiled, addressing such issues as early childhood interventions for children in poverty, neighborhood…