Generalization pattern when training was performed at multiple movement configurations. A, Contour plot of the aftereffects in Experiment 3 (top panel). The training was performed at four movement configurations [(θl, θr) = (0, 0), (0, 180), (180, 0), (180, 180)], and the aftereffects were measured at 64 movement configurations (8 movement directions for each arm) represented by the white dots. The bottom panel indicates the relationship between the aftereffects and movement direction of the trained left arm for each movement direction of the untrained right arm (mean ± SE). B, C, The generalization pattern predicted by the multiplicative (B) and additive models (C).