Across-subjects means and standard errors for the change in the index finger force (A), middle finger force (B), ring finger force (C), and little finger force (D) between Phase-2 and Phase-3. The data are shown separately for the three initial MTOT condition, pronation (PR, black bars), supination (SU, gray bars) and zero initial moment (ZERO, white bars) and the different feedback conditions (X axis). FMID stands for the middle finger force. Note the consistent FMID increase under conditions without FMID feedback.