Figure 1

Illustration of observability and controllability for some common health hazards. Hazards can be characterized according to their degree of "dreadfulness" or controllability (horizontal axis) and the degree to which they are understood or are observable (the vertical axis).

Source: Reprinted, with permission, from Slovic, P. Perception of Risk. Science 236:282. Copyright 1987 by the American Association for the Advancement of Science.

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