Table 4.

Results of the specialization items across the three specialization clusters

Specialization dimension	Casual	Intermediate	Advanced	Test of sign.
	(n = 454)	(n = 571)	(n = 42)
Mean number of trips in the last 24 month without guide	8.60	45.02	222.64	F(2,1066) = 440.3	p < .001
Mean number of trips on this river in the last 24 month without guide	3.09	12.61	151.12	F(2,1066) = 778.6	p < .001
Self-reported skill level (5 point scale)	2.34	3.89	4.36	F(2,1066) = 545.4	p < .001
Self-reported difficulty of rapid class (5 point scale)	2.89	4.20	4.45	F(2,1066) = 339.8	p < .001
Enduring involvement Index???(5 point scale)	3.31	4.40	4.69	F(2,1066) = 525.4	p < .001