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ΔV indices (dimensionless), averaged across subjects, for the total force (ΔVF, A) and the total moment of force (ΔVM, B) for the 3 force levels and 4 task conditions with SE bars. The ΔV indices were averaged over 200-ms time windows in the middle of each of the steady-state force intervals and further averaged across subjects. For each force level, 4 different bar patterns represent 4 conditions: Stable, empty bars; Pivot-IM, striped bars; Pivot-MR, solid bars; and Pivot-RL, grid bars.
