Figure 2.

Illustration of coordination lag and coupling pattern index calculations. Left panel depicts hypothetical variation of vertical head position of triad. The timing of peak height is indicated by the colored circles. The lag value of L₁₃ denotes the lag between 1st and 3rd person to jump and L₁₂ denotes the lag between the 1st and 2nd person to jump. Coupling pattern index (CI) can be calculated by dividing L₁₂ by L₁₃. Hypothetical variation of CI during a 20 successful repetition jumping sequence is depicted in the right panel.