Changes in performance over time while learning to use a myoelectric prosthesis.

Small interaction effects of group by object in hand closing time (F (3.4, 49.9) = 6.27; p = .00; η G 2 = .04), total grasp time (F (4.2, 61.3) = 7.63; p = .00; η G 2 = .04), and nearly significant synchrony at end (p = .03) revealed that a higher object stiffness resulted in a faster performance in the DG and COM groups, while the performance of the IG was about equal for the four objects (Figure 5 B).

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