The development of the concept of conservation was examined in 120 elementary school children divided into three groups: partially sighted, sighted, and sighted-blindfolded. (CM)

This study is a longitudinal follow-up analysis of children's performances on a number of Piagetian concrete operations tasks dealing with conservation and transitive inference. Subjects were 102 children selected from kindergarten and grades 1, 3, and 4. (Author/MP)

A data analysis procedure for testing the hypothesis that one task is a developmental prerequisite for another task is illustrated. The procedure was applied to new data on the acquisition of conservation concepts to test the hypothesis that synthesis, visual-scanning skills, and memory capacity are prerequisites of conservation mastery. (JMB)

Two studies sought to determine the developmental relationship between the child's use of counting as a notational symbol system to extract, compare, and reproduce numerical information and the development of number conservation. Subjects were four- to six-year-old children in Study 1 and seven- to nine-year-old learning disabled children in Study…

One hundred and thirty-eight post-graduate students enrolled in a Diploma in Education course were tested for their ability to conserve weight and volume. A methodological criticism of the earlier work of Elkind (1962) and Towler & Wheatley (1971) is offered which casts doubt on the extremely high proportion of non-conservers of volume reported in…

Investigates the development of understanding of quantity in 36 children with Down's Syndrome. Findings confirmed similarities in sequence of development between Down's Syndrome children and nonretarded children. Down's children who received training recognized conservation of continuous and discontinuous quantity. (RJC)

Provides data indicating that development occurs in cycles, with behavioral competencies appearing and developing and then disappearing only to reappear again in a more complex form at a later age. Data on conservation and auditory-manual coordination in infancy are used to support this theory. (ED)

This study compared the effects of a formal, an open-framework, and a control preschool program on children's intellectual development. The formal program, based on Ausubel's and Piaget's theories, had a daily schedule of short prescriptive teaching sessions followed by related learning activities. The informal program, based on Piaget's theory,…

The purpose of this study was to examine the relationships of children's performance on the Torrance Tests of Creative Thinking (TTCT) and on selected Piagetian tasks of conservation. Study subjects, 133 kindergarten and first grade multi-racial boys and girls, were administered the TTCT-Figural Form A and selected Piagetian tasks of conservation…

TO DETERMINE HOW TRAINING WOULD AFFECT CHILDREN FROM DIFFERENT LEVELS OF DEVELOPMENT, FIVE DISADVANTAGED AND FIVE ADVANTAGED PRESCHOOLERS WERE GIVEN SPECIFIC PROBLEM SOLVING TRAINING TO PREPARE TO SOLVE A CRITERION PROBLEM. THIS STUDY WAS AN ATTEMPT TO DISPROVE PIAGET'S THEORY THAT CHILDREN MUST HAVE REACHED A CERTAIN STAGE OF CONCRETE-OPERATIONAL…

Nursery school children (N=64) received seven tests of conservation of number which varied in the type and number of perceptual supports for conservation. Most of the tests with these supports facilitated performance in comparison to the standard conservation test. Conservation appeared earlier than usual. There were significant effects of…

The concepts "more" and "less" were analyzed into two meaning dimensions, "existence" (derived from children's early language) and "quantity," which were hypothesized to be developmentally related to acts of addition and subtraction. Two experiments tested two- and three-year-olds' comprehension of these concepts when initially equal or unequal…

The influence of the ability to conserve length in the development of a size concept was investigated in males and females aged 4 years through 9 years. (GO)