Effects of Different Levels of Precision of Knowledge of Results on the Acquisition of a Motor Skill

Students enrolled in two beginning bowling classes received the same basic instruction on bowling techniques, but practiced under two different levels of precision of knowledge of results (KOR). The experimental group practiced by rolling at a full set of ten bowling pins with each ball (precise KOR). The control group practiced by shadow bowling (general KOR). There were no significant differences between groups in the effects of the two practice conditions upon the acquisition skills. There were no significant groups by tests interaction either. There was, however, a significant trials effect across groups. It was concluded that although both practice conditions resulted in skill acquisition, neither level of precision of knowledge of results was superior to the other