Table 7

Correlations (Kendall's tau b) between travel factors: staff responses

Travel factors	1	2	3	4	5	6	7	8	9
Travel factors (independent variables) are numbered: 1, estimation of number of days away from home in 1999 due to mission travel; 2, estimation of longest mission; 3, estimation of the shortest time between trips; 4, estimation of how often one left just before or on weekends; 5, estimation of how often one took recuperative leave upon return from mission; 6, frquency of last minute changes in travel dates; 7, how often last minute changes in travel dates interfered with family plans; 8, perceived control over location, timing, and duration of travel; 9, perceived ability to refuse travel without harming career.
α=0.05; *α=0.01.
1 Days away from home	–	0.452**	−0.245**	0.124	0.072	−0.014	0.052	0.149	0.092
		n=93	n=89	n=95	n=95	n=95	n=91	n=95	n=93

2 Longest mission		–	0.166	0.212*	0.051	−0.061	0.006	0.034	0.082
			n=92	n=101	n=100	n=100	n=96	n=100	n=98

3 Shortest time between trips			–	0.105	0.105	−0.008	0.022	0.153	0.063
				n=94	n=94	n=94	n=92	n=94	n=92

4 Recuperative leave upon return				–	−0.051	−0.083	−0.058	−0.007	−0.083
					n=102	n=102	n=98	n=102	n=100

5 Departure on or before weekends					–	0.130	0.179*	0.154	0.281**
						n=102	n=98	n=102	n=100

6 Last minute changes						–	0.627**	0.332**	0.114
							n=98	n=102	n=100

7 Interference with family plans							–	0.335**	0.276**
								n=98	n=96

8 Control over travel								–	0.387**
									n=100

9 Ability to refuse a mission									–