The Baltimore Longitudinal Study of Aging (BLSA) was begun in 1958 to trace the effects of aging in humans and to distinguish between the true effects of aging and those processes, including disease, socioeconomic disadvantage, and lack of educational opportunity, that may appear or become more pronounced with time but are biologically irrelevant…

Advocates extra time between kindergarten and the first grade for academically and socially immature children to acquire learning skills and develop positive self-esteem. Includes three case studies of former transitional class students. (PKP)

Determined nonbiological characteristics that discriminated between age groups and hypothesized life stages for these groups (provisional adulthood, age 30 transition, and settling down). Life stages do not fit completely but were of some use in describing the age groups, particularly provisional adulthood and settling down. (Author/BEF)

The ways in which infants, toddlers, children, and adolescents learn social behaviors, through role models, social rules, and rewards and punishment, are described. A four-step social skills training program for preschoolers is discussed. A list of resource materials is provided. (JL)

This paper presents a model of cognitive development across the life span that is designed to integrate the diverse empirical evidence in the area of cognitive development in childhood and adulthood. Relevant research is reviewed in the relationships between performance and age, and the effects of training on performance. A model is then proposed…