How Playing-speed And Playing-frequency Of Video Affect Chinese National Divers’ Accuracy Of Performance-evaluation

In the field of competitive sports, the athletes’ talent have a huge effect on personal performance without any doubt, but few athletes are able to achieve big accomplishment in heated competition with the assistance from their talent only. The most important factor, as always, is the level of athlete’s motor skill. Thus, how to improve motor skill via practice in a scientific and efficient way has long been a big issue for researchers, coaches, as well as athletes. Feedback has been widely used to help athletes hone their motor skills in Sport Training and also a proved methods to offer positive influence on Physical Education. In the practice of motor skill learning, people have been took advantage of external video feedback in hopes of helping learners perceive, understand, support process and also correct the errors in the process of motor skill learning.This research conducted a series of experiments in an effort to find out the high-level Chinese divers’ favorite video-playing-speed during the process of video external feedback and the performance-evaluation-accuracy under different video-playing-speed, as well as how video external feedback frequencies under favorite video-playing-speed affect the performance-evaluation-accuracy. The 8 high-level(4 males, 4 females) Chinese divers were involved in the experiments. The average age of those divers is 21.5. Observation,experimentation and statistics methods were used in this article. The results of experiments are below.1.4(10m platform) diver shown a preference in different video-playing-speed video external feedback( F=9.3, p<0.05), meanwhile, 4(3m springboard) diver also shown preference in different video-playing-speed external feedback(F=7.8,p>0.05);2.Different video-playing-speed external feedback caused a significant impact on the accuracy of performance-evaluation(t=3.37,df=3,p<0.05);3.Under favorite video-playing-speed, the frequencies of video external feedback has no prominent effect on the accuracy of performance-evaluation(t=0.24,df=3, p>0.05)...