Addressing the Safety of Transportation Cyber-Physical Systems: Development and Validation of a Verbal Warning Utility Scale for Intelligent Transportation Systems

Table 3

Loading values on items of VWUS.

Scale items	Factor 1	Factor 2
Time to Display	−0.84	−0.51
Accuracy of Understanding	0.75
Representation of Event Urgency	0.60
Alertness		0.97
Initial eigenvalues	1.66	1.27
Variance explained (%)	41.51	31.7