Figure 6
From: Assessment of Joystick control during the performance of powered wheelchair driving tasks
Mean joystick movements and variability. Mean (± SD) joystick direction across trials for a typical novice (left) and expert (right) for A: Rolls Backwards 5 m B: Turns 180° in Place and C: Maneuvers Sideways tasks. Each vector represents the direction during a 100 ms data bin. D: Mean (± SD) joystick directional variability for novice (red) and expert (blue) participants for each task. The arc under each joystick (A, B and C) represents a single standard deviation of the vector scatter plotted on the joystick, while the v marks the value of the mean.