Sunday, March 30, 2014

Risk vs. Risk perception


Risk has been defined in a number of ways, but is often seen as the likelihood that an individual will experience the effect of danger. Every utility – sewerage, water, power, and gas – has a full portfolio of such risks. The less we trust the people who are supposed to protect us, or the people, government or corporate institutions exposing us to risk in the first place, or the people communicating to us about the risk, the more afraid we will be. The more we trust, the less fear we feel. The more we are aware of a risk, the more we are likely to be concerned about it. Concern about child abductions rises when the press is full of coverage of an ongoing case, although the probabilities are the same before that case showed up in the papers and after it is resolved. Can it happen to me? Any risk seems larger if you think you or someone you care about could be a victim. This helps to explain why statistical probability is often an ineffective form of risk communication. A risk of 1 in 1,000,000 can still seem threatening if you think you could be the one. This helps explain why the only acceptable level of risk to many people is zero.

These factors offer powerful insights that help explain why our fears often do not match the facts, and why they may be just as big a risk as the specific hazards about which we are worried. They contribute to potentially dangerous misperceptions of risk, which can lead to unsafe behavioral choices, either when we are more afraid of relatively small risks, or not afraid enough of relatively large ones. For example, many Americans sought a sense of control and safety after 9/11 by driving instead of flying. Air arrivals in Las Vegas were down 6.5% and motor vehicle arrivals were up 7.3% at the end of April 2002. 

People respond to a risk or hazard in ways consistent to their perception of that risk.  It is their perception that influences behavior or action. Understanding public perception of natural hazards is necessary in order to impact hazard preparedness, and can be a problem because residents of at-risk areas often have wrong beliefs about the hazard agent and its impacts, are unaware of available adjustments, and may have invalid beliefs about the effectiveness of the adjustments of which they are aware. Research shows that adaptive actions are motivated by awareness of the hazard, knowledge of how it can affect the community, and feelings of personal vulnerability to the potential consequences.

Peter Sandman breaks his work into three areas: scaring people who are ignoring something that is legitimately dangerous and risky; calming down a person who are freaking out over something that's not risky; and guiding people who are freaking out over something that is legitimately risky. To accomplish all this, Sandman came up with a useful equation: Risk = Hazard + Outrage. Deceptively simple, this formula includes both the objective, technical, measurable component (the "hazard") and the cultural, emotional, personal component (the "outrage" factor, including all levels of fear, anger and general upset). It is possible for the actual hazard to be low and the level outrage to be high however, and vice versa, and each situation requires a completely different approach. "Everything hinges on how elevated the hazard and the level of outrage are," explains Dr. Sandman. "If the level of hazard is low and the level of outrage is also low, there's nothing much going on. People aren't upset, and there's nothing for them to be upset about. This is not much of a business opportunity."

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