Loneliness becomes more prevalent as youth transition from childhood into adolescence. A key underlying process may be the puberty-related increase in biological stress reactivity, which can alter social behavior and elicit conflict or social withdrawal (fight-or-flight behaviors) in some youth, but increase prosocial (tend-and-befriend) responses…

Growth, maturation, and development dominate the daily lives of children and adolescents for approximately the first 2 decades of life. Growth and maturation are biological processes, while development is largely a behavioral process. The 3 processes occur simultaneously and interact. They can be influenced by physical activity and also can…

Findings of a series of studies on individual differences and maturational changes in expressivity at the neonatal stage and during early infancy are reported. Research results indicate that newborns are able to discriminate and imitate the basic emotional expressions: happy, sad, and surprised. Results show widened infant lips when the happy…

Human development has two different stories to tell. One describes the growth of the universal characteristics that are present in all human beings because humans possess a particular set of genes. Four examples of biologically prepared, universal characteristics in the psychological growth of children are the growth of memory, of moral sense and…

Asserts that the role of biologically transmitted individual differences needs to be explored fully, examines the assumptions underlying the emphasis on childhood in empirical research, and examines the nature, persistance and later impact of two sorts of orientations which may be acquired in childhood, political attitudes and party…

This report offers a broad overview of the three major categories of explanations of gender patterns in cognitive functioning. Two of the major categories are biological and psychosocial. The third category, explanations that have been attributed to differences in the educational experiences of men and women, is treated separately because while…

It is difficult to make progress in the study of emotions and emotional development if the meanings assigned to central constructs vary widely across investigators. This book clarifies and synthesizes the different ways in which emotion researchers approach fundamental questions about the nature of emotion and emotional development. Theorist and…

Based on the view that individual variability is best understood as the result of influences from multiple domains operating over time, this book describes how different domains of influence operate, describes the operating processes in common to the different influences, and shows how these processes meet the criteria for a full-fledged system.…