Validity and reliability of the tracking measures extracted from the oculus quest 2 during locomotion

Figures & data

Figure 1. Schema of the laboratory setup and the trajectories used during data acquisition.

Table 1. Relationships between OQ2 and Vicon measurements in static conditions.

	Position (cm)			Orientation (°)
	X (Medio-lateral axis)	Y (Anteroposterior axis)	Z (Vertical axis)	X (Pitch)	Y (Roll)	Z (Yaw)
Absolute	0.45	0.24	0.26	0.09	0.34	0.09
Mean Error	(SD=0.28)	(SD=0.14)	(SD=0.22)	(SD=0.06)	(SD=0.09)	(SD=0.10)
Absolute Max Error	1.01 (SD=0.31)	0.48 (SD=0.14)	0.83 (SD=0.21)	1.22 (SD=0.31)	0.49 (SD=0.07)	0.65 (SD=0.10)

(SD: standard deviation).

Table 2. Relationships between OQ2 and Vicon measurements in dynamic conditions.

	Position (cm)				Orientation (°)
	X (Medio-lateral axis)	Y (Anteroposterior axis)	Z (Vertical axis)	X (Pitch)	Y (Roll)	Z (Yaw)
Absolute Mean Error	5.21 (SD=0.0365)	3.86 (SD=0.0276)	1.20 (SD=0.0119)	4.52 (SD=2.74)	4.17 (SD=2.19)	0.54 (SD=0.32)
Absolute Max Error	19.3 (SD=0.0400)	13.1 (SD=0.0307)	6.61 (SD=0.0117)	11.10 (SD=1.77)	14.10 (SD=1.83)	2.69 (SD=0.79)
r values	0.99* (SD= 4.45e-04)	0.99* (SD=3.87e-03)	0.77* (SD=0.091)	0.93* (SD=0.083)	0.97* (SD=0.028)	0.99* (SD=5.84e-04)

(SD: standard deviation; *: p<0,01).

Table 3. Descriptive statistics of the position and orientation absolute errors during test-retest reliability.

	Position (cm)			Orientation (°)
	X (Medio-lateral axis)	Y (Anteroposterior axis)	Z (Vertical axis)	X (Pitch)	Y (Roll)	Z (Yaw)
Absolute Mean Error	1.10 (SD=0.36)	1.14 (SD=0.28)	0.76 (SD=0.42)	0.12 (SD=0.16)	0.22 (SD=0.04)	0.19 (SD=0.07)
Absolute Max Error	2.20 (SD=0.44)	0.98 (SD=0.28)	2.00 (SD=0.73)	0.64 (SD=0.21)	0.58 (SD=0.22)	1.79 (SD=0.13)

(SD: standard deviation).