Correlation Analysis between Dance Experience and Smoothness of Dance Movement by Using Three Jerk-Based Quantitative Methods

Abstract

The jerk-based quantitative method was first introduced for explaining the process and prediction of hand movement in space early on, and it was based on the principle that the maximum smoothness theory could be predicted by a bell-shaped velocity curve and straight line trajectory, which were the scales for assessing dynamic optimization by using kinematic end-point trajectory (Flash & Hogan, 1985). The jerk theory involved a method for calculating the jerk cost at the early stage. The jerk cost was calculated by differentiating the position coordinates during motor performance three times with respect to time (Schneider & Zernicke, 1989). Many researchers in the field of kinematics discovered through the jerk theory that a skilled individual moved his or her arms as smoothly as possible, which was based on the minimum-jerk hypothesis that states that the intensity of jerk decreased in more skilled motor performance. Moreover, the smoothness was quantitatively measured by integrated squared jerk (Platz, Denzler, Kaden, & Mauritz, 1994). In other words, from a kinematic perspective, this represented a concept that the integral KJSB Korean Journal of Sport Biomechanics 2016; 26(1): 1-9 http://dx.doi.org/10.5103/KJSB.2016.26.1.1 http://e-kjsb.org eISSN 2093-9752 ORIGINAL