The main purpose of this study was the exploration of the relationship between first graders' performance on traditional readiness measures and their performance on an instrument based on Piagetian tasks. All correlations among the predictive indices considered were significant (p less than .01), as were the correlations of these measures with…

The two purposes of this study were: (1) to identify those factors that significantly affect the use of the science process skill of prediction, and (2) to construct and test a probabilistic equation, based on a competence-performance model of cognitive development that accounts for a child's performance on tasks involving the skill of prediction.…

The purpose of this study was twofold: first, to answer the question of which abilities, from a selected set of 12 abilities from the structure-of-intellect model of Guilford, were related to achievement in Physical Science Study Committee (PSSC) physics, and, second, to determine how the physics achievement prediction properties of these…