Reaching accuracy in the combined task.A, Achieved direction and distance for each combination of instructed direction and distance (details are in the legend for Fig. 3A). The intersections of the dotted lines represent the ideal achieved directions and distances for the 16 combinations of instructed direction and distance.B, Relationship between achieved and instructed direction (details are in the legend for Fig. 3B). C, Relationship between achieved and instructed distance (details are in the legend for Fig. 3C). Regression lines in B andC correspond to unity (dashed), constrained accuracy performance (thin), and combined performance (thick).