Paul B. Thompson

Risk communication poses a challenge to ordinary norms of truth-telling because it can easily mislead. Analyzing this challenge in terms of a systematic divergence between expertise and public attitudes fails to recognize how two specific features of the concept of risk play a role in managing daily affairs. First, evaluating risk always incorporates an estimate of the reliability of information. Since risk communication is an effort at providing information, audiences will naturally and appropriately incorporate their assessment of the reliability of the risk communicator into their assessment of the risk as such. Second, one conceptual and grammatical feature of the concept of risk is to categorize experience as non-routine and demanding further deliberation. That is, the whole point of calling something a risk can be to distinguish it from activities or phenomena that need no further attention. Risk communications that stress relative comparisons of measured probabilities and expected utilities can be inconsistent with both features of our concept of risk. At best they mislead; at worst they undermine our society’s capacity to cope with risk. While there are no simple answers to these two conundrums, technical experts should bear them in mind when communicating with the broader public.