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.…

Forty low-achieving seventh and eighth grade students were involved in a study to ascertain whether intelligence, underachievement, or the difference between aural and sight vocabularies could predict relative learning rate with respect to reading achievement gains. For purposes of the study, "relative learning rate" was defined as the ratio of…