Table2.

List of finger parameters

1 Max of distance amplitude  2 Total traveling distance  3 Avg. of local max. distance  4 SD of local max. distance  5 Slope of approximate line of local max. points  6 SD of local max. distance in three adjacent taps  7 Max. of velocity amplitude  8 Avg. of local max. velocity  9 Avg. of local min. velocity 10 SD of local max. velocity 11 SD of local min. velocity 12 Energy balance 13 Number of freezing calculated from velocity 14 Avg. of distance rate of velocity peak in extending movement 15 Avg. of distance rate of velocity peak in flexing movement 16 Ratio of distance rates of velocity peak in extending and flexing movements 17 SD of distance rate of velocity peak in extending movement 18 SD of distance rate of velocity peak in flexing movement

19 Max of acceleration amplitude 20 Avg. of local max. acceleration in extending movement 21 Avg. of local min. acceleration in extending movement 22 Avg. of local max. acceleration in flexing movement 23 Avg. of local min. acceleration in flexing movement 24 Avg. of contact duration 25 SD of contact duration 26 Number of zero crossover points of acceleration 27 Number of freezing calculated from acceleration 28 Avg. of tapping interval 29 SD of inter-tapping interval 30 Inter-tapping interval variability 31 Skewness of inter-tapping interval distribution 32 SD of inter-tapping interval in three adjacent taps 33 Avg. of phase difference between the left hand and right hand tapping 34 SD of phase difference between the left hand and right hand tapping 35 Similarity of hands 36 Time lag of similarity of hands

Max: Maximum; Min: Minimum; Ave: Average; SD: Standard deviation

Standard deviation and coefficient of variation are parameters with high similarity to each other and indicate “variation.” In this study, to avoid multicollinearity, we used standard deviation parameters and omitted parameters indicating the coefficient of variation.