Measuring Workplace Travel Behaviour: Validity and Reliability of Survey Questions

Table 2

Spearman’s and Kappa correlations for travel mode and travel time comparing online survey retest to travel diary and initial all-staff online survey.

	Travel mode		Travel time
	𝐾 (95% CI)	𝑃	𝜌	𝑃
Validity
Overall	0.62 (0.35–0.89)	<0.0001	0.75	<0.0001
Monday	0.77 (0.45–1.0)	<0.0001
Tuesday	0.79 (0.56–1.0)	<0.0001
Wednesday	0.89 (0.68–1.0)	<0.0001
Thursday	0.63 (0.31–0.94)	<0.0001
Friday	0.38 (−0.05–0.80)	<0.007
Reliability
Overall	0.82 (0.57–1)	<0.0001	0.83	<0.0001
Monday	0.37 (−0.15–0.9)	<0.004
Tuesday	0.81 (0.56–1)	<0.0001
Wednesday	0.57 (0.24–0.90)	<0.0001
Thursday	0.69 (0.37–1.0)	<0.0001
Friday	0.79 (0.39–1.0)	<0.0001