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골프퍼팅 기술학습에서 내재적 피드백과 외재적 피드백의 상대빈도 효과
육동원,이한우 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2
The purpose of this study was to verify how the feedback source and frequency could influence on sport learning. using golf putting task, and to examine guidance hypothesis depending on feedback source. The subjects of this study were consisted of 60 university male-students. They didn't have any prior experience of golf putting. They were randomly assigned to six experimental condition(extrinsic feedback-KR 10%, 50%, 100% condition; intrinsic feedback-vision 10%, 50%, 100% condition). The task used in this study was 8m golf putting task, and dependant variables were absolute error(AE) and variable error(VE). Experimental design was 2(feedback)×3(frequencies)×10(block) factorial design with repeated measures on last factor at acquisition phase, and 2×3×2 factorial design with repeated measures on last factor at retention phase. The results of this study could be summarized as follows. In the analysis of accuracy. (a) Vision 100% and 50% condition was more effective than vision 10% condition at practice. (b) KR 50% condition was more effective than KR 100% condition at retention test. (c) Vision 100% condition was more effective than vision 10% condition at retention test. (d) KR 10% and 50% condition was more effective than KR 100% condition at transfer test, (e) Vision 100% condition was more effective than vision 10% condition at transfer test. In the analysis of consistency, (f) KR 50% condition was more effective than KR 100% and 10% condition at retention test. (g) Vision 100% condition was more effective than vision 10% condition at retention test. finally, these results means that guidance hypothesis was supported in the extrinsic feedback condition but it was not supported in the intrinsic feedback condition.
육동원 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1
This study examines such direct perception approaches. The purpose of this study investigated a strategical role of optical visual control in a task of baseball hitting simulation on the motor expertise level. Ten expert baseball players and ten novice students were required to hit a simulated object as it passed to one side of the point of observation under three different LED speed conditions (2.5, 4.5, 7m/s). Results indicated that experts performed more accurate than novices in timing errors. Also, timing accuracy decreased with increased LED speed while VE in the timing of contact was reduced at higher LED speed. Experts performed slightly shorter movement time than novices under three different speed conditions. Finally, tau-margins (Taul and Tau2) revealed that experts were slightly bigger tau-margin values than novices while tau-margins values were significantly reduced at higher LED speed.