Table 1.

Acceleration comparisons between vocal and non-vocal trajectories for temporally isolated signals in each behavioral context.

	Relative Speed of Vocalizer	Vocal Trajectory		Non-Vocal Trajectory		t	p
		Mean Accel	Std Accel	Mean Accel	Std Accel
FF - F Voc - F Rec	Faster	0.27	1.34	0.17	1.19	0.71	0.48
	Slower	−0.15	1.38	−0.21	1.30	0.37	0.71
MF - F Voc - M Rec	Faster	1.07	1.45	0.25	1.26	2.89	0.01*
	Slower	−0.65	1.89	−0.39	1.70	0.90	0.37
MF - M Voc - F Rec	Faster	0.21	1.75	0.30	2.08	0.55	0.59
	Slower	−1.00	2.63	−1.14	2.63	0.67	0.50

Units = cm/s², *significant differences.