Fig. 6.

Results of experiment 3. A: across participant mean force compensation indices (±SE) of left and right hand force channel trials for the control group with no instruction and the Mimic group instructed to mimic the forces with their left hand. To average left hand performance, the signs of left hand forces were flipped for 8 of 19 participants in the Mimic group and 4 of 17 in the control group, as they appeared to report in an inverted reference frame. B: mean force profiles (±SE) at the beginning, middle and end of field A practice, with separate means for participants displaying a more external or more internal reference frame. C: variance in perpendicular channel force accounted for by along-channel position, velocity, or a linear combination of the two. Shaded areas are bootstrapped 95% confidence intervals.