Background: Little is known about the nature, range and prevalence of different subgroups in language trajectories extant in a population from 4 to 11 years. This hinders strategic targeting and design of interventions, particularly targeting those whose difficulties will likely persist. Methods: Children's language abilities from 4 to 11 years…

Proposed is an approach to child development which holds that intellectual capacity, neuromuscular development, language development, and temperament are overlapping areas; and considered are often unrecognized behavioral aspects of temperament. (MC)

This address examines the future of biobehavioral science and the opportunities and pitfalls it holds for individuals with intellectual and developmental disabilities. Examples of recent advances in genetics and neurosciences are discussed, as well as opportunities that these advances hold for understanding the effects of the environment on…

Children born to heroin-dependent mothers (n=83) were compared to 76 children born to heroin-dependent fathers and to 3 control groups with and without environmental deprivation and health problems. Results found that developmental delays and behavioral disorders found among heroin-exposed children resulted primarily from severe environmental…