The effects of two instructional strategies for sequencing examples and nonexamples of the concept "parallelogram" were compared for sixth graders. A rational sequence was favored over a random sequence at the formal level of concept attainment; no interaction effect was found between the strategy and students' mathematical ability. (MNS)

Examines hypotheses and strategies used by children at the kindergarten, second-, fourth- and sixth-grade levels in making proportional judgements. The task involved 36 trials in which the child had to choose between two groups to obtain a target-color "chip." Results generally conformed to the developmental sequence proposed by Piaget…

Examines the development of students' understandings about fractions during six weeks of instruction. Reports that all students possessed informal knowledge disconnected from their knowledge of fraction symbols and procedures and that knowledge of rote procedures often interfered with students' attempts to build on their informal knowledge.…

Reports seven studies of the acquisition of knowledge about the appearance-reality distinction and suggests some conclusions about the course of conceptual development in this area from early childhood (3 years) to adulthood. (Author/NH)

The conceptual frameworks of Thai children (n=48) related to causes of health and sickness were analyzed using the "Interview-about-Instances" and the "Conceptual Profile Inventory" techniques. The results indicate that Thai schoolchildren hold considerable personal knowledge about the causes of health and sickness that does…

During the last 10 years, cognitive science researchers have produced research findings that have great potential for increasing students' understanding of science. However, commercial publishers continue to produce textbooks and teacher's guides in traditional ways. This project developed a prototype unit which used an alternative approach to…

This study explored the usefulness of an approach to science instruction which specifically considered children's spontaneous conceptions about natural phenomena. The aim of the instruction was the development of conceptual understanding. The instructional approach involved diagnosing children's spontaneous conceptions, making them aware of their…

Employing a new procedure for measuring peer concepts, this study investigated the development of differentiation and accuracy of children's concepts of their peers' attributes. Subjects, 18 second-graders, 23 fourth-graders, and 18 sixth-graders, were asked to rate characteristics of their peers in mathematics, athletics (running), and in two…

Describes a study of sixth graders which was conducted to determine whether general ability or locus of control influences selection of instructional options in a computer-based lesson on four propaganda techniques used in advertisements, and whether the selection of options increases achievement on tests involving classification of new items.…