내적 타이밍 과제에서 동작의 연속성과 속도에 따른 타이밍 제어 전략: 메트로놈 동기화 훈련의 적용

Purpose: The purpose of this study is to examine the difference in accuracy and variability of performing internal timing tasks according to the continuity and speed of motion, and to verify the effectiveness of synchronized metronome training. Methods: 24 participants were randomly assigned to two groups(continuous or discrete) and performed a synchronization timing task. Participants in the study performed the timing tasks to match the target while turning the right hand in a round shape, in accordance with the auditory signals provided at three regular tempos(30bpm, 45bpm, 60bpm). In addition, synchronized metronome training(SMT) was conducted for 4 days to confirm the improvement of sensory-motor synchronization(SMS) ability. Timing accuracy and variability were calculated using absolute error of time, variability of time error, and success rate of performance within 15ms error. Results: Timing accuracy was higher in continuous motion than in discrete motion. And it was high as the speed of movement increased. The timing variability did not show a significant difference according to the continuity, but increased significantly as the speed increased. The interaction effect of speed and continuity that did not show in timing accuracy. But the timing variability increased as the speed increased in the continuous motion group. Success rate also showed the same result as timing accuracy, and SMT training resulted in improvement of timing accuracy and performance success rate over 2 days of training. Conclusion: Motor skill that require the accuracy of coincidence timing needs to consider the motor control and learning strategy that considers relatively high speeds in continuously moving conditions.