Children follow a Piagetian cognitive-developmental sequence in their ability to understand age concepts, as shown by the association between responses on the Concept of Age instrument and level of reasoning on conservation tasks. Education in aging must consider the reasoning patterns of children of various ages. (Author)

The association of locus of cerebral hemispheric specialization of spatial function with identity and equivalence conservation judgments was tested in a group of four- to six-year-old right-handed children (N=31). (Author/MP)

Thirty-four educable mentally retarded young adults were given a one-bit logic problem (Experiment 1) or a test of conservation (Experiment 2) and classified as either low or high performers. In a second session, the low performers were paired with the high performers, and the dyads were required to agree on the solution to the problems presented.…

Support for the contention that the empirical specification of the Piagetian concept of reversibility during training is not a requirement for conservation induction is presented in this experimental study. (Author/JKS)

A comparative study of conservation development in partially sighted, sighted, and sighted blindfolded children at four age levels was assessed. Conservation on tasks of mass, weight, and volume were evaluated using Piaget and Inhelder's prediction, judgment, and explanation questions. The significant differences were found between groups, task,…

This study attempted to identify the factors of intelligence associated with the solution of a Piagetian task. Liquid conservation and 18 psychometric tests which included subtests from the WISC, ITPA, Raven Matrices, Primary Mental Abilities, and others were administered to 133 first- and second-grade boys and girls. (MS)

Discusses students' understanding of the qualitative conservation of matter and how this understanding is influenced by previous instruction in chemistry and task variables. Results show the influence of group membership, task content, and problem context on students' performance. (ZWH)

Discusses a series of experiments to establish a significance of temperature difference in rates of cooling, to illustrate the connection between energy transfer and the consequent temperature changes for thermally connected systems that are not in equilibrium. (MKR)

Applies the concepts of kinematics and conservation of mechanical energy to calculate the time needed to reach a certain point along semicircular and parabolic paths. Presents numerical calculations for the critical speed thresholds for the paths of semicircular and parabolic curves. (JRH)

Explores how the apparent loss of energy in inelastic collisions may be understood by considering a simple model of two rigid balls connected by a spring. Includes a numerical simulation of this and an extension to include Newton's Cradle. (DDR)

This study tested 148 preschoolers between the ages of 48 and 72 months on a Piagetian number conservation task. Children's judgment accuracy, estimation, and response latency were measured. Children were also questioned about the number conservation principle. A four-step developmental sequence was hypothesized: (1) nonconservation; (2) correct…

Discusses the fact that although most historians of science attribute the formulation of the law of conservation of matter in chemical reactions to Antoine Lavoisier at the end of the eighteenth century, several earlier researchers had already assumed this law in their work. These researchers include Joseph Black, Henry Cavendish, M. V. Lomonosov,…

Studies of the hierarchical attainment of conservation of physics concepts revealed significant differences with respect to age, sex, and grade level in a random sample of seventh and eighth grade students. Conservation of a quantity did not necessarily depend on the prior conservation of its constituent fundamental quantities. (MLH)

Preservice teachers administered Piagetian tasks to elementary students. On the whole data collected compared favorably with the findings of Renner (EJ 044 727) in showing that students achieved conservation of substance (liquids and solids), length, area, and weight at later ages than stated by Piaget. No significant sex differences were found.…