The sport of Taekwondo has advocated the use of the Protector and Scoring System (PSS) in all of its major competitions to help reduce scoring errors from human judges. The main purpose of this study is to determine the reliability of a custom built mechanical pendulum apparatus designed to test the effectiveness of the PSS. To determine the apparatus reliability, an accelerometer was placed at the end of the pendulum to record the peak acceleration of the pendulum in the Y axis. Two sets of data, consisting of 50 trials each were collected on separate days, using two different testers but using the same exact hardware settings. It was found that there was no significant difference between the two sets of data (p > 0.05). The standard error of the apparatus was similar for both sets at 0.002ms−2. The Bland-Altman plot showed evenly distributed points in the scatterplot graph which indicates that the two sets of data are in agreement together with the linear regression analysis. The data from this study suggest that the custom built apparatus is a reliable instrument. The peak acceleration of the pendulum for each trial was highly consistent. Thus, the apparatus should be able to serve its purpose of measuring the reliability and accuracy of the Taekwondo electronic body protector scoring system.
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- Reliability of a Pendulum Apparatus Designed to Test the Taekwondo Electronic Body Protector
R. W. L. Chong
- Springer Singapore