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)

This study was designed to assess the effects of teaching the concept of interior volume, and methods of computing this volume, on the ability of fith-grade students to conserve volume. Conservation of volume was measured by an instrument developed by Lovell and Ogilvie. Instruction was in a mode compatible with the majority of elementary…

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;…

The objective of this study was an attempt to clarify the nature of number conservation with number conservation tasks using variations in length, area, and volume. According to Piagetian theory, conservation is attained successively for number, length, area, and, finally, volume. It was hypothesized that success on the number conservation tasks…

This study examined the effects of a specified set of activities on the ability of educable mentally retarded (EMR) children to use the transitive property and conserve the three relations "same number as,""more than," and "fewer than." Thirteen EMR students, aged 12 to 15, were taught eleven lessons on establishing and conserving these relations,…

The main problem of this study was to attempt to determine the source of adults' nonconservation error as well as to explain young children's apparent success. Subjects were 188 children from elementary school, high school, and college. (Author/MP)

Studies the nature and development of perceptual estimation in a task requiring the coordination of spatial dimensions. (BD)

Compared the performance of 29 institutionalized cultural-familial mental retardates on Piagetian conservation tasks. Examined the effects of age, sex, and degree of retardation on conservation performance. (BD)

This study investigated the relationship between reflectivity-impulsivity and performance on Piagetian tasks with primary-grade children. Findings indicate that performance was best among the more reflective students but that performance of the normally more impulsive students would increase if they were restrained from answering too quickly. (LS)

Results indicate that identity conservation generally does not precede equivalence conservation; instead the two conservations tend to co-occur. (Authors)

A study of conservation of length concepts covering the symmetric, asymmetric, reflexive, nonreflexive, and transitive relations. Their order of development was traced during the course of a 15-lesson sequence of related instruction. (MM)

The expectation that an effective conservation training procedure would be one in which the child was confronted with opposing points of view was investigated in an experiment and a replication experiment in which the child's point of view was brought into conflict with those of other children. (Author/RY)

An investigation was conducted with 200 first-grade students to determine whether language is a major factor in conservation of number experiments. It was concluded that language was not a major factor. (RP)

This article reports a study conducted with fourteen learning-disabled elementary students to determine the growth of achievement and conservation abilities after using the "Sink or Float" unit of the Elementary Science Study. (MK)

This study sought to identify prerequiste concepts for a child to perform length measurement meaningfully. Conservation of length and use of transitive reasoning were major areas identified. Implications for teaching are given, especially concerning the use of a number line as a model for presenting arithmetic operations. (LS)