Notes advantages of using dynamic models to understand cognitive functioning: (1) they are specifically intended to represent changes that systems undergo as they evolve; (2) they can capture change in a continuous fashion; (3) they can account for development of behavior that appears orderly at times and disorderly at others, and (4) chaotic…

This issue's special section on canalization of behavioral development is introduced. In the special section, an invited paper by Gilbert Gottlieb, adopts a systems approach that stresses the complex interaction of genes, behavior, and environment. Several comments on the Gottlieb paper are also included. (BC)

Evaluates John B. Watson's contributions to developmental psychology. Watson's insistence on objective methodology in psychology retains its influence, but his extreme environmentalism has been rejected. His concern with the principles of learning is reflected in the work of Hull and Skinner. (BC)

Thirty-two preschoolers were observed while they played with realistic play props and nonrealistic play materials in an effort to determine whether realism of play objects was related to overall symbolic object transformation. Boys of all ages and girls under age five demonstrated greater symbolic activity with realistic play props. (SH)

Theories are discussed concerning the relative significance of biological and environmental issues to giftedness, with discussion organized into the "onset" period of the late nineteenth century, with contributions by Charles Darwin, Frances Galton, and Karl Pearson; and the "flowering" period of the early twentieth century with Lewis Terman. (JDD)

This study of 59 children (ages 1-3) at risk for severe mental retardation suggests that subjects exhibited repetitive motor behaviors topographically similar to those exhibited in typical infant development; there were significant age differences in expression of these behaviors; and a small percentage of these children exhibited atypical…

Describes seven myths regarding the role of genes in determining behavior and the modifiability of behavior that permeate the thinking of many educators and psychologists. Examines each myth, dispels it, and states what are believed to be correct conclusions from different kinds of behavior-genetic and related data, considering the implications…

Examines possible neurological causes of the various indices of D attachment status. Describes a system of attachment categories and the criteria for assessing disorganized and disoriented behavior, pointing out which of these behaviors may result from neurological abnormalities. Suggests a strategy for differentiating neurological risk status…

Presents the current status and new perspectives on the Structured Learning Theory (SLT), with special consideration given to how SLT has been influenced by recent research in software engineering. Topics include theoretical constructs; content domains; structural analysis; cognition; assessing behavior potential; and teaching and learning issues,…

Research in aggressive behavior development has distinguished between proactive (i.e., intended to achieve an instrumental goal) and reactive (i.e., emitted as an emotional response to provocation) subtypes of aggression. A similar distinction has not been made with regard to prosocial behavior. In this study, subtypes of both aggressive and…

Currently, behavioral development is thought to result from the interplay among genetic inheritance, congenital characteristics, cultural contexts, and parental practices as they directly impact the individual. Evolutionary ecology points to another contributor, epigenetic inheritance, the transmission to offspring of parental phenotypic responses…

A study investigated the nature of the social construction of play events by a group of twelve 4- and 5-year-old children and the ways in which these play constructions are maintained over an extended period of time. The 5-month study was conducted in a nursery school classroom during the children's self-selected playtime. Data collection included…

The activity level of preschool boys relative to preschool girls was observed to find whether a sex-linked pattern of hyperactivity is observable in the general population. Boys were found to be more active than girls, with patterns similar to those included in definitions of hyperactivity. (GO)

This review examines the available evidence in support of the argument that serum uric acid (SUA) possesses considerable promise as an indicator of one type of biochemical influence on achievement behavior. The evidence arguing for further research into the role of serum cholesterol in achievement behavior is also examined. (Author/JR)

Efforts to end overcrowded and inhumane conditions at large and isolated state schools for the mentally retarded have led to resettling former patients in diverse residential programs. (Editor)