Table 5.

Mean Duration (Mins) and Number of Interviews^* by Mode and Device

Device		Live Video	Web Survey	Prerecorded Video	Overall
Computer	Avg. Duration	9.84	7.80	12.43	10.10
	Median	9.38	6.69	10.81	9.08
	# Iws % Within Mode	186 (66.7%)	187 (46.5%)	206 (53.5%)	579 (54.3%)
Smartphone	Avg. Duration	9.93	5.75	13.79	9.48
	Median	9.47	4.97	11.88	8.83
	# Iws % Within Mode	89 (31.9%)	190 (47.3%)	155 (40.3%)	434 (40.7%)
Tablet	Avg. Duration	9.55	6.87	13.42	10.04
	Median	9.73	7.01	10.83	8.96
	# Iws % Within Mode	4 (1.4%)	25 (6.2%)	24 (6.2%)	53 (5.0%)
Total # Iws		279	402	385	1066
Avg. Duration		9.87	6.77	13.04	9.85
Median Duration		9.46	5.85	11.2	9.00

^*One case (in Web survey, Computer) was excluded as an outlier; its duration was four times that of the next highest case.