In 1995, Nelson published a paper describing a model of memory development during the first years of life. The current article seeks to provide an update on the original work published 20 years ago. Specifically, we review our current knowledge on the relation between the emergence of explicit memory functions throughout development and the…

The study of development vacillates between a focus on change (i.e., studying how and why infants are so different from adults) and excitement about early competence and continuity (i.e., studying how capable infants are, and marveling at how similar they turn out to be to adults). The study of memory development has been no exception. This…

This study examined developmental differences in, and cognitive bases of, coping flexibility in children with and without ADHD. Younger (age 7 to 8) and older (age 10 to 11) children with and without ADHD (N = 80) responded to hypothetical vignettes about problematic interactions with peers that shifted from controllable to uncontrollable over…

A longitudinal study of 31 babies in their twelfth through twenty-third weeks of age tested the Neo-Piagetian theory of a shift or spurt in infants' cognitive development at the age of 4 months. Results were consistent with this neo-Piagetian concept of stage change. (MDM)

A total of 192 second- to sixth-grade children, showing three different levels of class-inclusion answers (failure, correct answer based on counting, correct answer based on logical reasons), performed four necessity tasks. Results are discussed with reference to individual and constructive generalization processes. (Author/RH)

A total of 41 children ranging in age from 9 months to 6 years, 6 months of age were observed playing at game-like tasks. Disruptive interventions were made at different times and with different levels of intensity. Children's reactions revealed developmental stages in wanting to do things by themselves; stages varied with the development of…

Argues that Susan Sugarman's article in this issue contains some valid criticism of assumptions in developmental psychology, but that some of her conclusions regarding other assumptions need to be questioned. Suggests that many problems raised by Sugarman would disappear if developmental psychologists concentrated on children's early achievements…

Introduces the common theme among the papers presented in this issue, the development of working memory. Underlines the two different approaches presented. The neo-Piagetian perspective attempts to capitalize on the insights of Piaget's work by proposing information-processing accounts of cognitive development. The second perspective stems from…

Attempts the theoretical rapprochement of two theoretical constructs on working memory, neo-Piagetian models and Baddeley's model. Summarizes both types of models, then discusses their similarities and differences. Presents the results of a longitudinal study that supported the idea that these models might be complementary rather than…

Reviews ideas and knowledge concerning the development of a cognitive understanding of the social world from preadolescence through adolescence. Analyzes the relationship between social cognition and peer and family relations. (BD)

Argues that there are significant ways in which neither Piaget nor his successors in developmental psychology have adequately described the child's mind and how it changes. Proposes alternative guidelines for research that aims more directly at identifying essential constituent features of the child's mental reality. (PCB)

Cognitive activity of children from 1.5 to 5 years of age participating in problem solving and in spontaneous play was analyzed in terms of the successive coordination of existing patterns and the incorporation of new mental components. Analysis identified a series of developmental levels. (Author/RH)

Examined the relationship between 7-, 9-, and 11-year old children's performance on a battery of selected Piagetian measures and on a proportional reasoning task. Found a strong relationship between stage level and (1) the complexity of hypotheses used, (2) the use of the proportional hypothesis, and (3) the overall use of logical hypotheses. (HOD)

Four groups of children (N=80; C.A. 6.6. to 12.5; M.A. 7.9 to 14.7) were tested for ability to reproduce five-element two- and three-dimensional patterns. Significant interaction and main effects were found. Three-dimensional pattern performance increased with age; all ages performed well on two-dimensional patterns. (Author/DB)

Proposes that cognitive developmental stages can be accounted for in terms of information processing factors which limit the highest level of cognitive system which children can attain at any given age. Delineates four progressively more complex levels of cognitive mediation of the environment. Two experiments which support the developmental model…