Fig. 8.

Passive controls. Mean (±SE) change in uncertainty range for subjects in the passive controls. Subjects did not perform active motor learning but experienced the same kinematic trajectories as subjects who did (passive, solid). The robot was programmed to move each subject's passive arm through the same kinematic trajectories as a subject chosen from the main study, who performed active motor learning. Passive-count (shaded) gives mean change in uncertainty range for subjects who were specifically asked to attend to the passive movements by counting the number of times the robot moved their hand in a leftward direction.