Effect of High-Altitude Environment on Driving Safety: A Study on Drivers’ Mental Workload, Situation Awareness, and Driving Behaviour

Table 3

Results of internal consistency and validity of factors.

Category	Cronbach’s alpha	KMO statistic	Bartlett’s spherical test	Cumulative (%)
Ordinary violations (OV)	0.731 (0.811)^a	0.744 (0.839)^a	0.000 (0.000)^a	50.876 (48.261)^a
Errors (ER)	0.864	0.862	0.000	64.717
Aggressive violations (AV)	0.821	0.824	0.000	59.127
Lapses (LA)	0.845	0.856	0.000	61.694
Driving behaviours (DB)	0.917 (0.921)^a	0.927 (0.927)^a	0.000 (0.000)^a	60.300 (59.150)^a

^aResult before ov_2 and ov_5 was deleted.