Fig 4. Adaptive changes of hand movements during practice of a visuomotor rotation.
Direction errors of reaching (a) and inter-trial variability (i.e., circular variance) of the direction errors (b) are shown. Mean values of all participants are plotted against 40 trial blocks with 4 trials each for the 30° (triangles), 75° (open squares), and 150° (filled squares) groups. Mean values of baseline performance (BL) are also plotted. In (a), the error bars represent a 95% confidence interval. The confidence intervals of the 2nd, 3rd, and 5th blocks of the 75° group are missing because too large inter-subject variability prevented a reliable calculation. In (b), the error bars represent the SE. Circular variance has an arbitrary unit with 1 being the maximum and 0 the minimum.