The study attempted to trace the relationship between facility with cardinal-ordinal aspects of number; attention to dimensions of number, length, and density; and the presence and absence of number conservation. On the basis of performances on the standard test for number conservation, 25 nonconserving kindergarteners, 34 conserving…

Piagetian conservation tasks in relation to standard intelligence tests with mildly mentally retarded students from different ethnic groups were investigated. Seventy-five boys between the ages of 10 and 15, who scored between 65 and 80 on the WISC, were studied. Elkind's procedures for conservation of substance, weight, and volume were used.…

Study tests four predictions derived from Piaget's cognitive theory. (CB)

Speed and acceleration tasks were administered to children in grades three through six. Piaget's results were replicated. Suggestions concerning the appropriate grade level to introduce different types of motion tasks are made. (AL)

Area and measurement tasks representative of those used by Piaget were administered to 168 primary students. Data were analyzed to determine effects of sex, age, and task sequence. (SD)

Piaget's theory of cognitive development is explained, especially in relation to the teaching of elementary school science. Several research projects involving Piaget's theories are reviewed. (MLH)

Reported is a study to determine whether 249 ninth-grade students completing the third year of the Intermediate Science Curriculum Study (ISCS) instructional sequence performed differently on 19 conservation tasks than did 239 non-ISCS ninth-grade students. The tasks were presented via 35-mm color slides and a tape-recorded protocol. Students in…

The purpose was to determine (1) if there was a significant difference in the performance on five science-related Piaget type tasks by fifth graders who were currently involved in different elementary science programs, and (2) if the tasks formed a hierarchical sequence of difficulty for the students. Three groups of fifth graders were studied;…

Studied effectiveness of teaching conservation of chemical identity, composition, and mass to 12 boys and 11 girls of ages ranging from 11.11 to 12.10, using techniques analogous to Piaget's. Indicated the necessity of course re-examination to facilitate attainment of conservation concepts. (CC)

The use of equivalent-age children as tutors was investigated, and the cognitive changes of these tutors was examined. All first and second grade boys at two elementary schools were administered a pretest, and all those in a transitional stage of development between non-conservation and conservation of substance were selected for inclusion in the…

Research supported by NICDH research grant HD-MH-03008.

Two studies dealing with length conservation and measurement indicate that caution needs to be used when one looks at and makes claims about children's cognitive ability and development with regard to conservation. (MP)

Piaget's notions on conservation and transitivity are discussed, along with interpretations and experiments by some of Piaget's critics. Several general teaching suggestions also are included. (DT)

The goal of books in this series is to present work that is on the growing tip of research in cognitive development. The theme of this volume is children's logical and mathematical cognition, a field in which Piaget's influence has been extensive. In the first of the six chapters, Acredolo presents a new theory of the cognitive bases for…