Table A1.

Statistical results from ANOVA analysis on planned comparison between PD “off” and healthy comparison (HC) participants and between PD “off” and PD “on” to evaluate the effects of basal ganglia dysfunction on coordination accuracy and stability.

Factor(s)	Coordination accuracy	Main significant finding	Coordination stability	Main significant finding
Group	F(1, 20) = 12.46, p < 0.01*	Greater accuracy by HC	F(1, 20) = 12.29, p < 0.01*	Less variability by HC
Condition	F(2, 40) = 5.4, p < 0.01*	Greater accuracy in no vision and normal vision	F(2, 40) = 9.46, p < 0.001*	Less variability in no vision and normal vision
Phase	F(1, 20) = 24.36, p < 0.001*	Greater accuracy in in-phase	F(1, 20) = 58.98, p < 0.001*	Less variability in in-phase
Required cycle frequency	F(5, 100) = 45.47, p < 0.001*	Greater accuracy at slower frequencies (0.75, 1, and 1.25 Hz)	F(5, 100) = 44.08, p < 0.001*	Less variability at slower frequencies (0.75, 1, and 1.25 Hz)
Group × phase	F(1, 20) = 5.39, p < 0.05*	Greater accuracy by HC during anti-phase	F(1, 20) = 8.51, p < 0.01*	Less variability by HC during anti-phase
Group × required cycle frequency	F(5, 100) = 4.34, p < 0.01*	Greater accuracy by HC at fastest cycle frequencies (1.75 and 2 Hz)	F(5, 100) = 1.85, p = 0.11	N/A
Group × phase × required cycle frequency	F(5, 100) = 2.83, p < 0.05*	See Section “Coordination Accuracy” under Section “PD ‘Off’ vs. Healthy Comparison Participants”	F(5, 100) = 2.03, p = 0.08	N/A
Group × condition × required cycle frequency	F(10, 200) = 0.4, p = 0.9	N/A	F(10, 200) = 2.54, p < 0.01*	See Section “Coordination Stability” under Section “PD ‘Off’ vs. Healthy Comparison Participants”

* denotes significance below p < 0.05