The role of reduced frequency of knowledge of results during constant practice

Two experiments wee conducted to further examine the effect of reduced knowledge of results (KR) frequency on the learning of motor skills during constant practice. In Experiment 1, participant in five KR conditions (100% KR, 50% KR-fade, 50% KR-reverse fade, 50% KR-alternative, an 50% KR-random) practiced a movement timing task. In Experiment 2, participant in two KR conditions (100% KR an 50% KR-fad) practiced a waveform reproduction task. The results of both experiments failed to indicate that reduced KR frequency was more effective in promoting learning than the 100% KR conditions. The present study adds to the incasing number of experiments that do not find a benefit of reduced KR frequency on learning in constant practice.