Humans perceive and act on risk in two fundamental ways. Risk as feelings refers to individuals' instinctive and intuitive reactions to danger. Risk as analysis brings logic, reason, and scientific deliberation to bear on risk management. Reliance on risk as feelings is described as "the affect...

This paper reports the results of an experiment designed to test competing conjectures about the evolution of public attitudes toward nanotechnology. The rational enlightenment hypothesis holds that members of the public will become favorably disposed to nanotechnology as balanced and accurate...