This paper suggests that continued high-risk behavior is the result of
the heuristics used to make judgments under uncertainty, and that the
same heuristics may be mobilized to increase the use of safer-sex pra
ctices. In order to explain why it is that individuals fail to make ef
fective use of the information they may have concerning rates of infec
tion, consequences of infection and their own at-risk status, theory a
nd research in several areas will be considered. Developments in the b
readth of areas to which basic research on decision-making has been ap
plied continue to provide new approaches toward understanding and over
coming the processes by which we reason (Kahnemann, 1991). it is worth
reminding ourselves that public health campaigns in other areas have
led to changes in behavior. Reasoning, even with its biases, is still
the route by which we make decisions, most of them effective and self-
protective.