A computer microworld called Triple Representation Model uses graphical, tabular, and algebraic representations to influence conceptions of function. A majority of students were able to cope with partial data, recognize invariants while coordinating actions among representations, and recognize invariants while creating and comparing different…

Classroom discourse can nurture students' appreciation of mathematics as a community activity by involving students in defining the curriculum, engaging in authentic mathematical inquiry, and using the history of mathematics to understand how mathematical thought develops in society. (MKR)

Used a microgenetic method to examine knowledge acquisition as a process by coordinating existing theories with new evidence. Subjects were 17 community college students (ages 22-47) and 15 fourth graders. Assessed knowledge acquisition in problem solving in both physical and social domains. Found multiple strategies for, and varying levels of,…

Three experiments (sorting and theory-of-mind tasks) examined whether, for preschoolers, a particular form of reasoning applied to theory-of-mind and a set of problems requires understanding of mental states. Found that advances in theory of mind, card sorting, and causality depend on ability to switch judgments across conditions; reasoning by…

Notes that sorting is an early classification activity; as language develops, objects can be sorted by various attributes and described. Describes key experiences in this developmental sequence, and provides guidelines and specific suggestions for selecting for classroom use "attribute materials" designed to lead students to both…

Examined the nature of sociocognitive growth in 66 kindergarten and first-grade children by having pairs of children work together to solve spatial perspective-taking problems. Found that the entering performance composition of the dyads did not affect cognitive growth, whereas the construction of shared cognitive experiences in which children…

Analyzed the influence of a comprehensive program of nurse home visitation on the intellectual functioning of children born to women who smoked cigarettes during pregnancy. Found that comprehensive home-visitation services before and after delivery can offset the impairment in intellectual functioning associated with substantial maternal smoking…

This study evaluated the Bielefeld Developmental Test for Blind Infants and Preschoolers by comparing cognitive performance of blind and sighted children (ages three and four). Results indicated that even this test (with "blind-neutral" items) did not permit a fair comparative assessment, though it did prove suitable for within-group…

Reports results of 14 studies on children's knowledge about thinking. Suggests that preschoolers appear to know that thinking is an internal mental activity that can refer to real or imaginary objects or events. However, preschoolers are poor at determining when a person is and is not thinking. This shortcoming is considerably less evident in…

Reports on research that showed that preformal-operational fourth graders could indeed benefit from classroom writing instruction on the higher-order skill of persuasive writing. (SR)

Argues that Vygotsky's "zone of proximal development" (ZPD) can be redefined as a nonlinear dynamic model. Presents a mathematical reformulation that generates a variety of developmental patterns and has the capacity to show under which conditions unwanted or unsuccessful developmental paths may occur. Illustrates how this reformulation…

Notes that Halford's book does not really address children's own understanding but rather the psychologist's attempt to understand children from the outside. Discusses the five major sets of ideas at the core of Halford's explanations of capacity, complexity/dimensionality, development, and learning. Examines two arguments against Halford's…

Comments on Gauvain's discussion, in this issue, of the development of thinking from a sociocultural perspective, expanding her analysis by comparing research on apes who have developed in natural habitats with apes raised by humans in something resembling a human culture. Argues that the study of nonhuman primates can contribute to the emerging…

Examines children's comprehension and learning of expository texts on micro-, local-, and global-level processing skills. Finds a gradual increase in higher level processing skills with age. Notes that critical developmental patterns from nine-year olds onward took place in local- and global-level processing. Finds that developmental patterns were…

Investigates the relationship between cognitive abilities at age four and reading at age seven. Shows that reading ability was positively correlated with knowledge of grapheme-phoneme correspondence, visual memory, auditory sequential memory, and Draw-a-Man scores (intelligence). Suggests that cognitive deficits predate reading problems. (PA)