Mental rotation results. Mean number of errors for the LPD (n= 7), RPD (n=6), and NC (n=6) subgroups on the mental rotation of hands when the hand to be mentally rotated was presented in the left visual field. Results are collapsed across rotation axis (2-dimensional, 3-dimensional). Nine rotation angles were collapsed into three levels of rotation: Low (20°, 40°, 60°), Medium (80°, 100°, 120°), and High (140°, 160°, 180°). (From Amick et al. 2006b; Neuropsychologia, 44, Elsevier)