This approach to the subject of adolescence is comprehensive, embracing three determinants which are universal for any stage of individual human development: (a) biology, (b) culture, and (c) psychology. The chapter on biology presents a brief review of the physical and physiologic changes of puberty, taking note of the impact of puberty on the…

This article describes tests which examined at what ages children could correctly identify right and left sides of pictures of themselves, another person, or an object. (CD)

This paper is a critical examination of Piaget's formulations on cognitive development based on recent social learning research. It is suggested that learning to conserve does not seem immutably dependent on the child's attaining some maturational age-related cognitive stage and that Piaget's theorizations do not sufficiently consider social…

An analysis of the quantitative processes underlying conservation of quantity is presented. Models of three quantitative operators--subitizing, counting, and estimation--are derived from adult performance in quantification tasks, and some features of the operators are described. The emergence of conservation is described in terms of the…

This booklet offers practical, easy-to-read suggestions for teachers, paraprofessionals, and parents to help them understand learning development and learning disabilities. The text outlines how the factors of heredity, maturation, and environment determine the degree of development an individual will achieve. The characteristics of children with…