"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)

Experiment compares the effect of equilibration type training to the effects of S-R reinforcement type training in developing weight-conservation concepts in second and third grade pupils. S-R group performed significantly better than control group on initial posttest for conservation of weight. A measure for permanence of the conservation beliefs…

Examines which conservation type (identity or equivalence), if any, is attained at an earlier age. Findings support Piaget's position that identity and equivalence are concomitant developments. (CP)

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)

Two Piagetian tests which require manipulation, two conservation tasks, and the Longeot pencil and paper formal reasoning test were administered to 62 high school biology students. For all measures the males' mean level was higher than that of the females. (MLH)

The author examines Novak's position that science and mathematics educators should discard Piaget's theory of intellectual development in favor of Ausubel's theory of meaningful learning as a guide for teaching practice and research. (PB)

The general purposes of this study were to analyze responses on five Piagetian formal operational tasks in a test-retest situation to determine the extent to which taking a pretest effected scores on posttests and to determine task and examiner reliabilities. Significant test score gains on Piagetian tasks appeared to result from test-retest…

Using the US national sample from the Third International Mathematics and Science Study (TIMSS) and the Rasch modeling method, this study identified the conceptual progression sequence of various matter concept aspects, and compared students' latent abilities against the sequence. We found that the four matter aspects, i.e. conservation, physical…

Explores the cognitive development of Nepalese students by administering Piagetian-type tasks and comparing geographically and culturally different children. Boys and girls (N=256) of ages 8, 10, and 12 were administered tasks of conservation, classification and seriation, and causality. Implications for curriculum development in Nepal are made.…

Israeli children's (kindergarten to grade nine) explanations about the water cycle are described. Reports the children's views about the source of clouds and the mechanism of rainfall. It was concluded that understanding evaporation is a necessary condition for explaining a mechanism of rain containing the ideas of condensation and heaviness. (YP)

A general model of conceptual change which is largely derived from current philosophy of science, but which can illuminate learning as well, is described. Some features of this model are illustrated by interviews with students studying special relativity in physics. Finally, some pedagogical implications are presented. (Author/PB)