Group means of the individual kinematic variables at the individual strikes.

<p>I, M, R, and L indicate the index, middle, ring, and little fingers, respectively. The error bar indicates one standard deviation. Left panel: joint angle of the striking finger, Middle panel: joint angular velocity of the striking finger, Right panel: correlation coefficients of movement between the striking finger and each of the remaining fingers. For example, the 2^nd strike was made by the middle finger, which is defined as the striking finger. Here, a correlation was computed during the period between the 1^st and 2^nd strikes.