Research has documented two effects of interfeature causal knowledge on classification. A "causal status effect" occurs when features that are causes are more important to category membership than their effects. A "coherence effect" occurs when combinations of features that are consistent with causal laws provide additional…

The purpose of the study was to experimentally test the theory that programed instruction can satisfactorily teach psychomotor tasks which primarily require the learning of cognitive knowledge in order to properly utilize motor skills already possessed. A programed unit on regrinding drills was selected, and a dexterity test and self-instructional…