One hundred eight college students (Study 1) and 109 elderly adults (S
tudy 2) rated 28 health impairments for the quality of life perceived
to be possible in that state, the extent to which the state was percei
ved as a fate better or worse than death, and the extent to which the
state was perceived to interfere with the ability to engage in the act
ivities each individual valued most in life. States perceived most neg
atively were those perceived to interfere most with valued life activi
ties. For any given health state, evaluations were more negative the m
ore the state was perceived by individuals as likely to interfere with
engagement in their valued life activities. Implications of these res
ults for end-of-life medical decision making in general and the use of
advance medical directives in particular are discussed.