Aftereffects on Day 1 and Day 2.

The vertical axis represents the difference between the last rotation session and the first non-rotation session (baseline). A mixed-design ANOVA revealed a statistically significant interaction between the day of training and the amount of training (F(1,36) = 8.14, p ηp2 = 0.18) and the main effects of the amount of training on Day 1 (F(1,36) = 31.85, p ηp2 = 0.47). A post-hoc test revealed the simple main effect of the amount of training on Day 1 and Day 2 (F(1,36) = 34.52, p ηp2 = 0.49; F(1,36) = 11.78, p ηp2 = 0.25) and that of the day of practice in the 20-session groups (F(1,18) = 6.87, p ηp2 = 0.28). The aftereffects marked with asterisks were significantly higher in the 20-session practice groups than in the 10-session practice groups (all ps < .001).