The Piagetian concept of horizontality was studied in 195 fifth graders to determine the relationship between this concept and memory. (ST)

This study examined the effects of judgment-contingent feedback and prior knowledge of 3 rules on the conservation learning of 188 kindergarten children. (Author/JMB)

Examines the prediction that the ordinal property of natural number symbols is more easily learned by preschoolers than the cardinal property of natural number symbols. (Author/ED)

This paper reports two experimental studies of the development of time, speed and distance concepts in children. In Experiment I subjects (12 in each of four age groups: 5-, 8-, 11-year-olds, and adults) were asked to judge which of two electric trains on parallel tracks went faster, for the longer distance, or for more time. Subject's knowledge…

The purpose of this study was to attempt to train the horizontality concept in a group of first graders who were non-operational on the horizontality concept but transitional on what Piaget has termed the precursor concepts of distance and length conservation. There were two groups of subjects (training and control), all of whom had failed a…

Challenges the assumptions concerning the necessity of feedback in children's cognitive development. Suggests that during a certain and limited phase, cognitive development may occur due to cognitive restructuring. Discusses the implications of this for educational programs, especially computer assisted learning. (MJP)

The main purposes of this study were to determine: (1) how high school students represent the physical phenomena of phase changes; (2) how they modify their representation of these physical phenomena to accommodate new observation; (3) what factors lead to student difficulty in modifying representations; and (4) how the…