Table 1.

Mean values (M) and standard errors (SE) of response times and kinematic parameters recorded during the execution of lip protrusion and lip stretching movements for all the experimental conditions.

	Aperture gesture						Closure gesture
	Meaningless		Negative		Positive		Meaningless		Negative		Positive
	M	Es	M	Es	M	Es	M	Es	M	Es	M	Es
LIP PROTRUSION
Response Times—RTs (ms)	449.36	32.60	414.63	18.61	421.47	29.50	448.88	29.76	353.45	19.83	370.26	34.38
Movement Duration—MD(ms)	320.74	26.65	301.78	18.82	276.09	14.95	293.96	13.68	316.38	18.78	321.80	20.40
Mean Lip Velocity—MLV(mm/s)	40.72	3.67	41.47	3.21	44.13	3.22	41.81	2.49	38.68	2.67	39.75	3.16
Movement Amplitude—MA(mm)	12.20	0.67	12.00	0.53	11.80	0.60	12.03	0.55	11.88	0.61	12.20	0.57
LIP STRETCHING
Response Times—RTs (ms)	472.70	26.22	446.60	27.72	402.22	22.10	515.44	33.03	425.75	25.79	430.35	35.88
Movement Duration—MD (ms)	330.92	24.87	360.07	27.91	335.42	26.57	350.42	29.32	327.03	25.15	335.08	24.51
Mean Lip Velocity—MLV (mm/s)	32.38	5.42	29.49	4.69	32.33	5.08	30.82	4.81	31.38	5.23	31.63	5.32
Movement Amplitude—MA (mm)	10.47	1.45	10.42	1.42	10.54	1.45	10.58	1.47	9.97	1.49	10.13	1.49