Summary of the absolute performance at the test workspace (untrained region): a, b initial and final evaluation for the training arm (right arm); c, d initial and final evaluation for the non-training arm (left arm). Performances in all evaluation fields significantly improved from initial exposure to final evaluation. There was also a higher absolute performance for the aligned display compared to the non-aligned display. Performance predicted by the ideal models spanned the range of subjects’ performance. (Bars represent individual group mean and 95 % confidence interval range. Filled bar = aligned display; unfilled bar = non-aligned display; blue, green, and red color = end-point, right-joint, and left-joint fields; diamonds represent subjects’ individual contribution to their group. Circles show changes predicted by ideal models that extrapolate the training environment using either the end-point (E), right-joint (RJ) or left-joint field (LJ))