Table 4

Cronbach's alpha

Variable	Alpha	Number of cases	Items
Problem-Solving (three vignettes)	0.931	301	12
Problem-Solving (morbidity vignette)	0.820	301	4
Problem-Solving (mortality vignette)	0.823	301	4
Problem-Solving (quality of life vignette)	0.864	301	4
Decision-Making (three vignettes)	0.951	301	6
Decision-Making (morbidity vignette)	0.906	301	2
Decision-Making (mortality vignette)	0.910	301	2
Decision-Making (quality of life vignette)	0.922	301	2
Problem-Solving and Decision-Making (three vignettes)	0.939	301	18
Problem-Solving and Decision-Making (morbidity vignette)	0.839	301	6
Problem-Solving and Decision-Making (mortality vignette)	0.847	301	6
Problem-Solving and Decision-Making (quality of life vignette)	0.837	301	6

The alpha values vary from 0.820 to 0.951 indicating good internal consistency between the items.