Performance on myoelectric grasp force control tasks with stiff and compliant grasp interfaces.

White bars: A1, Shaded bars: T5. A) Mean absolute value of the reach error. B) Variability of the reach error data presented as the mean standard deviation of the reach error. C) Mean task duration D) Variability of the task duration data presented as the mean standard deviation of the task duration. All results (N = 10) include their corresponding SEM. * indicates significant difference (p<0.05).