Table 1.

Correlation coefficients between data acquisition system (DAS)/iPhone and DAS/Android devices.

Driving maneuver		r lat a		r lng a
		iPhone	Android	iPhone	Android
Cornering
	Left hard (>0.45 g)	0.86	0.94	0.65	0.88
	Left	0.82	0.99	0.58	0.93
	Right hard (>0.45 g)	0.78	0.97	0.63	0.98
	Right	0.80	0.99	0.77	0.96
Braking hard (>0.45 g)		0.76	0.93	0.84	0.89
Turning
	Left hard (>0.45 g)	0.87	0.99	0.90	0.93
	Left	0.90	0.97	0.69	0.95
	Right hard (>0.45 g)	0.85	0.98	0.75	0.96
	Right	0.84	0.99	0.63	0.97
Average		0.83	0.97	0.71	0.95

^aPearson correlation coefficients, r, for acceleration along x (lateral, r_lat) and z (longitudinal, r_lng) axes.