Table S3.

Speech initiation and executive function analyses.

	Instruction delay (s)	PD patients ON Reaction time (s)		PD patients OFF Reaction time (s)		Control participants Reaction time (s)		Interaction Task × group (PD vs. CON)	Interaction Task × group (ON vs. OFF)
		Mean	SEM	Mean	SEM	Mean	SEM	F-value (p-value)	F-value (p-value)
Reading task with neutral intonation	0.33	1.01	0.01	1.03	0.01	1.01	0.02	0.3 (0.770)	0.5 (0.585)
	0.67	0.91	0.01	0.92	0.01	0.92	0.01
	1.00	0.88	0.01	0.91	0.01	0.91	0.02
Reading task with happy intonation	0.33	0.98	0.01	1.02	0.01	0.97	0.01	0.1 (0.893)	0.0 (0.971)
	0.67	0.91	0.01	0.93	0.01	0.91	0.01
	1.00	0.90	0.01	0.93	0.01	0.91	0.01
Executive task with button press	0.28	0.89	0.03	0.94	0.02	0.78	0.01	0.2 (0.880)	0.1 (0.946)
	0.38	0.86	0.02	0.88	0.02	0.75	0.01
	0.60	0.77	0.02	0.80	0.02	0.67	0.01
	0.93	0.72	0.02	0.71	0.01	0.67	0.01

SEM = standard error of the mean; CON = controls.