Fig. 4.

Comparison of cerebellar patient and older control experimental results during passive and active movement. All individual subject JNDs for the passive movement condition (A) and active movement condition (B) are shown. For each movement condition, a subject’s JND in the temporal inline and spatial orthogonal tasks is connected by a line (cyan for cerebellar patients and black for older controls). C: group average JND during the passive movement condition. There was a significant main effect of group (P = 0.034), indicating that cerebellar patients had worse acuity than controls. There was also a significant main effect of task (P < 0.001), indicating that for both groups acuity was better in the spatial orthogonal task than the temporal inline task. D: group average JND during the active movement condition. There were significant main effects of both group (P = 0.010) and task (P < 0.001). There was also a significant interaction (P = 0.039), which was driven by worse acuity in the cerebellar patients compared with controls for the temporal inline task. Values are means ± SD.