TABLE III.

Descriptive mean and standard deviation (SD) values for head turn amplitude and velocity, given for body-fixed and global (i.e., space) reference frames, for stabilizing (i.e., the head was rotating slower than the body) and volitional (i.e., the head was rotating faster than the body) turns.

	Stabilizing	Volitional
	Mean (SD)
Head-on-Body Turn Amplitude (°)	57.06 (9.44)	61.95 (7.47)
Head-on-Body Turn Angular Velocity (°/sec)	36.62 (4.9)	38.12 (4.03)
Head-in-Space Turn Amplitude (°)	38.39 (7.68)	88.53 (9.96)
Head-in-Space Turn Angular Velocity (°/sec)	58.49 (11.32)	139.85 (27.41)
Head Turn Count (n)	1548 (520)	3145 (933)