This study measured the skinfold thickness of Negro and white children for one year. No sex or race related trend was apparent. (Author/JW)

Concludes that both asymmetry of muscle tonus and somesthetic stimulation contribute to the normally occurring lateral differences in responsiveness, though other factors are involved. (MH)

Puberty culminates in a dramatic and visually apparent set of changes in each individual. Social and psychological effects of the meaning of these changes are an important component in understanding the significance of puberty for adolescents and their behavior. (CJ)

An attempt is made to find how polarity arises and is maintained, which is a central issue in development. It is a fundamental attribute of living things and cellular polarity is also important in the development of multicellular organisms and controversial new work indicates that polarization in mammals may occur much earlier than previously…

In this article, the author describes the various changes that are experienced by young adolescents. Physically, early adolescents are growing faster than at any other time in their lives except infancy. They experience significant increases in weight, height, heart size, lung capacity, and muscular strength. Intellectually and cognitively, early…

Being asked to give the Charles H. McCloy research lecture is one of the highlights of the author's academic career. Although McCloy's primary area of expertise was measurement and the analysis of motor skills, he also shared an avid interest in youth development through sport and physical activity. In this article, the author features youth sport…

This study represents a quasi-experimental test of the role of early social-emotional experience and adult-child relationships in the development of typically developing children and those with disabilities birth to 4 years of age living in orphanages in St. Petersburg, Russian Federation. The three orphanages in the current study were selected…

This is a brief preliminary report of an anthropometric measurement study of a group of Head Start children. The areas of primary concern were patterns of tooth eruption and basic head and body dimensions. Permanent Head Start personnel were trained to make the observations and measurements. The sample consisted of 148 children (76 boys, 72 girls)…

Selection of proper competitive activities for athletes is discussed in relation to the acknowledged fact that cellular adaptation is dependent upon the specific program employed in training for competitive events. (MB)

The article is intended to provide educators and parents with a definition of atlanto-axial instability and dislocation (abnormal increase of mobility of the two upper cervical vertebrae) discuss related factors to causation, identify visible symptoms, review pertinent recommendations from the medical community, and comment on the disorder's…

Findings indicate that the maturation age for dropouts was significantly earlier than the maturation age of those who graduated. (Author)

In a speech presented at the 45th annual convention of the American School Health Association, Chicago, 1971, author reviews some of the limited evidence and extensive speculations relating nutrition to these areas in human biology, life, growth, and learning. (Author/BY)

Infants living in various geographic locations are found to differ as much as 9 pounds in average body weight, 5.5 inches in average body length, and 2.5 inches in average chest circumference. (Author/WY)