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…

The role of biological maturity in behaviors in adolescents which most often are considered as negative by adults was investigated for a normal group of girls. (Author/LMO)

The relationship between biological maturation, as evidenced by skeletal growth, during adolescence and the development of drinking habits and alcohol abuse was studied for a representative group of Swedish males (N=88). Early and late maturers had more advanced drinking habits at age 14 years than did normally maturing subjects. (TJH)

Examined the role of biological factors, such as perinatal complications, and psychological factors, such as maternal attitudes, in predicting developmental outcomes in preterm children. Findings support the main effects model of biological and environmental factors in explaining developmental psychopathology, but also the interactional model, as…

Data are presented from a long-term follow-up study investigating the interplay of various factors contributing to the developmental outcome of prematurely born children. Fifty-eight low-risk pre-term Hungarian children are compared to 100 full-term children, from birth to age 6, on socioeconomic status, family climate, and intellectual…