Figure 3. Absolute error: individual subjects.

Averages of absolute error of 5 trials from all subjects are shown as a function of reference hand d_y (+30, 0, and −30 mm) for the four matching conditions, and connected with different colors for each subject. The thick black line denotes the mean absolute error averaged across 15 subjects with standard error of the mean. Top panels show the opposite condition, in which subjects were asked to reproduce d_y using the opposite hand after a brief delay. Bottom panels show the same condition, in which subjects used the same hand to reproduce d_y after a brief delay. These two conditions are shown separately for the symmetric (left) and asymmetric (right) condition, in which postures of the reference and test hand were congruent and inverse, respectively.