The axioms of additive conjoint measurement provide a means of testing the hypothesis that testing data can be placed onto a scale with equal-interval properties. However, the axioms are difficult to verify given that item responses may be subject to measurement error. A Bayesian method exists...

Severity of illness is an important official criterion for priority setting in health care in a number of jurisdictions. An 8-point scale of severity and functional status has been used in a number of studies in Norway in order to estimate the strength of concerns for severity in population...