Tracking performance across the 4 days of practice (3 blocks per day) and retention testing (1 block labeled “Ret”) for A) Overall tracking error for the repeated sequence, B) Overall tracking error for random sequences, C) Spatial tracking error for the repeated sequence, D) Spatial tracking error for random sequences, E) Time lag of tracking for the repeated sequence, and F) Time lag of tracking for the random sequences. For overall and spatial tracking error lower scores indicate improved performance. For time lag of tracking scores closer to zero represent improved performance. Data are mean; error bars are SEM.