Twenty-two 9- to 12-year-old disabled children with severe mathematics disabilities and 18 normal controls with average math achievement were given six tests of conservation. Significant group differences appeared which indicated that many learning disabled children have not yet developed the concept of conversation, even in the upper elementary…

Use and understanding of dimensional language facilitated conservation. (ST)

Explains various heat transfer techniques and devices that permit the automatic and economic recovery and reuse of heat generated by lights and occupants of buildings. (Author)

"For seven to nine year old children, it is easier to conserve weight on plasticine rather than on a rubber band or on alcohol in a thermometer . . . Boys perform significantly better than girls." (Author/AL)

Reports results of short-term training procedures upon the acquisition of the concept of conservation in children. (DR)

Reports a new technique for assessing conservation of liquid quantity using sealed bottles. When used with a sample of 40 six- and seven-year-olds, results correlated strongly with those of the traditional Piagetian task involving pouring. (SJL)

Thirty five-year-olds were given number conservation tasks within their subitising and their counting ranges. For the experimental group, counters were joined by threads. These children's superior performance suggests that, when such one-to-one correspondence is a salient clue, young children can effectively apply the principle of invariance.…

Twenty-one male and 21 female adolescents were tested individually for conservation of mass, weight, and volume. (CM)

Measures of concrete operational thought and the Raven's Coloured Progressive Matrices were factor analyzed for a sample of primary students. Results indicated that primarily perceptual abilities are required for solution of the Piagetian tests, although abstract reasoning is involved in the solution of matrices and in conservation of substance…

Conservation of liquid was measured on a zero-to-six scale and correlated with scores on a standardized reading test for a sample of seven year old children. Observed correlations were not significant and tend to confirm most previous research in the area. (Author/JKS)

An empirical test of alternative claims by Bryant and Piaget concerning the development of invariance of quantities in 3- and 4-year-old children was made. Results support the Piagetian thesis in showing that those subjects respond with stereotypic strategies rather than by an invariance of number principle. (Author/JMB)

Background: Traditional studies of children's mastery of conservation of volume in liquids and solids have reported that conservation of volume in liquids is an easier concept to master than its solid counterpart. However, the two concepts have been assessed in different ways, with the assessment tool for solids employing a more complex process.…

This study was designed to assess the acquisition of conservation of number on equal addition tasks through scalogram analysis to determine if this analysis defines a scale or continuum. Ten block tasks administered to 85 kindergarten children validated Piaget's theory that cognitive development is sequential and continuous. (Author/ED)