This meta-analysis examined main effects and heterogeneity in associations between popularity and academic adjustment in the U.S. and China across 41 studies. The aggregated sample included 22,151 children and adolescents (10,934 boys; 11,217 girls) from both countries, with U.S. students from various ethnic backgrounds. Results in the U.S. were…

Gene expression is one of the main molecular processes regulating the differentiation, development, and functioning of cells and tissues. In this review a handful of relevant terms and concepts are introduced and the most common techniques used in studies of gene expression/expression profiling (also referred to as studies of the transcriptome or…

Variations in phenotype reflect the influence of environmental conditions during development on cellular functions, including that of the genome. The recent integration of epigenetics into developmental psychobiology illustrates the processes by which environmental conditions in early life structurally alter DNA, providing a physical basis for the…

Explores the hypothesis that representation, as measured by object permanence attainment, is the main prerequisite for language acquisition. Differing definitions of representation, differing assumptions about cognitive stages, and differing criteria for assessing cognitive abilities such as object permanence may account for some of the divergent…

Argues that dynamic systems approaches may provide an explanatory framework based on general scientific principles for developmental psychology, using principles of self-organization to explain how novel forms emerge without predetermination and become increasingly complex with development. Contends that self-organization provides a single…

Reviews research on children's and adults' beliefs about fantasy and their tendency to engage in "magical thinking." Suggests that children are not fundamentally different from adults in their ability to distinguish fantasy from reality. Both entertain fantastical beliefs and engage in magical thinking. Offers suggestions regarding age…

Finds that, between five and seven years of age, the majority of healthy children in modern urban-industrial societies achieve an understanding of the irreversibility, nonfunctionality, and universality of death. Suggests reasons for ambiguous findings concerning the relationship between the acquisition of the concept of death and developmental…

If human cognitive development advances through a series of broad and general stages, then the child's mind at any developmental point should seem consistent and similar across situations in its maturity level and general style. However, there appear to be factors and conditions that promote homogeneity and heterogeneity in the child's cognitive…

Reviews evidence for a developmental sequence in symbolic play and attempts to provide a theoretical rationale for predicting correspondences between symbolic play and early language. (Author/RH)

Study assessed compliance and internalization for 99 preschoolers previously studied as toddlers. Compliance and internalization were assessed in multiple observational contexts using maternal reports. Found that committed and situational compliance had distinct developmental trajectories, and only committed compliance was associated with…

Reviews a series of studies documenting that key aspects of helpless reactions to failure are present in preschool and early elementary school children. Proposes a preliminary model in which a general conception of self and the notion of this self as an object of contingent worth are sufficient conditions for helplessness. (HTH)

Examines cues which guide the discovery of simple cause-effect relations, beginning with the properties (suggested by Hume) of temporal precedence, covariation and contiguity; explores variables which can influence simple causal judgments; and discusses developmental evidence regarding inference principles associated with causal schemata.…

Argues that the operating characteristics of perceiving and remembering provide a foundation for progress on detailing the processes through which knowledge is realized in real-time tasks and in detailing the processes of developmental change. Includes three examples to illustrate how forming developmental hypotheses in terms of perceiving and…

Analyzes what is known about how children's judgments of their intellectual competence and their definition and criteria for evaluating competence change with age and experience in achievement contexts. (PCB)

Evaluates what has been learned regarding the impact of early close relationships on psychological development, by examining the origins of continuity and change in attachment security and its prediction of later behavior. Evaluates research on impact of changing family circumstances and quality of care on attachment security. Offers new…