Explored the relationship between the emergence of operational thought and the development of taxonomic categories in 101 first-graders. Concrete operational subjects showed a greater appreciation than preoperational subjects for taxonomic relations involving atypical exemplars. (RJC)

Investigates the relationship between 24 children's experiences in their second year, their mental and emotional disposition before and after the second year, and their motivational competence. Type and quality of experience were related to mental and emotional disposition. (RJC)

Investigated the role of schooling and urbanization on the acquisition of conservation of physical quantities in 384 Senagalese children of 7, 9, 11, and 13 years. Results revealed functional divergences in the acquisition of physical quantities. (RJC)

States that the concept of developmental stages is going through a revival. Compares developmental stages from three points of view: (1) Piaget's original formulation, (2) cognitive development, and (3) socio-moral development. Outlines reasons for maintaining a hard-structural stage model by the Kohlbergian theorists. (GG)

Students who enjoy the advantage of a good world geography course in high school are receiving a firm basis for subsequent learning as college students and future citizens. Geography builds on a world image that furthers understanding of a totally integrated community by reaching beyond country and region. Includes two references. (MLH)

Reviews the ValueTale series of books which are designed to demonstrate how positive values influenced the lives of famous people. Concludes that they fall short of their goal. Points out that the series attempts to teach concepts beyond the understanding of the intended learners. (KO)

Studies seven experiences of 69 infants of 12 1/2 and 17 1/2 months in dyadic play with mothers, fathers, and first-borns. Mothers and fathers were more alike than different in the amounts of play experiences they created, and infants experienced a more enriched environment with parents than with first-borns. (RJC)

This response to Brainerd and Reyna's paper (in this issue) argues that the common resources hypothesis can be applied to a wider range of phenomena than can the output-interference hypothesis. Presents results of a dual-task experiment under bidirectional deficits. Concludes that dual-task studies do not provide critical tests of the resources…

Reflecting on obsessional play objects of infants, Hodgkin suggests that a proper understanding of these "transitional" or "cognitive" objects could lead to an educational model of a "learner" involving a number of human competencies, all developing synergistically. Contends that such a model may be truer to life than…

Observed social interactions of 110 Embu children in rural Kenyan community bimonthly between 15 and 30 months of age. Found children who talked frequently, and whose vocalizations were responded to, performed better on assessment measures and showed more positive affect than children who had fewer social interactions or were carried a great deal.…

Thirty young children with handicaps were assessed on five self-recognition mirror tasks. The set of tasks formed a reproducible scale, indicating that these tasks are an appropriate measure of self-recognition in this population. Data analysis suggested that stage of self-recognition is positively and significantly related to cognitive…

Examined expressions of spatial knowledge of first-, fourth-, and sixth-grade children who performed model construction, verbal description, and route reversal tasks after mastering a pedestrian maze. Age-related differences were found in rate of learning the maze, and equivalent abilities in sequencing intersections and route reversal. (SAK)

The possibility that four famous men--Thomas Alva Edison, Woodrow Wilson, Hans Christian Andersen, and Leonardo da Vinci--might have been reading disabled is considered by examining information concerning: (1) biographical records, (2) cognitive characteristics, (3) neuropsychological characteristics, and (4) biological characteristics. (Author/DB)

Investigated the effects of biomedical and social-environmental conditions on cognitive and language development in children toddlers. Hypothesized a strong effect of biomedical factors in first two years and a strong environmental influence at three years. Used analysis approach to estimate variables assumed to underlie measurement data. Results…

Major events in the maturation of the central nervous system (CNS) are reviewed relative to milestones for communication, speech, language, and cognition. Early insults to the CNS and their neuropsychological consequences are discussed. The role of patterns of myelination and dendritic branching to evolving stages of language and cognition are…