I'm not an expert on Risk Assessment, but it would seem to me that when people were considering the riskiness of traveling by car versus by air, they would have been likely to consider that (after September 11) there had recently been four commercial flights in which all passengers had been killed. The NSC data would not have included this information in their data base. I don't think that the possibility/probability of further terrorist hijackings would be independent of the incidence of recent terrorist hijackings, and so wouldn't people be making a conditional risk calculation? That is, the comparison would not be Probability of dying in a car crash versus Probability of dying in a plane crash (37:1), but rather Probability of dying in a car crash in the next few days of traveling versus Probability of dying in a plane crash in the next few days of traveling given that there had been recent terrorist hijackings of commercial flights (??:1). What I'm getting at is that the increase in car travel was not necessarily all a result of the "dread risk" phenomenon, but also included some novel calculations of relative risks based on reality rather than overreaction. -Max Maxwell Gwynn, PhD Psychology Department Wilfrid Laurier University 519-884-0710 ext 3854 [email protected]
>>> "Frantz, Sue" [email protected]> 3/25/2009 11:51 AM >> Bungled Risk Assessment and Tragic Road Trips Fearing dying in a terrorist airplane crash because the September 11 events were so prominent in our memories, we reduced our air travel and increased our automobile travel, leading to a significantly great number of fatal traffic accidents than usual. It is estimated that about 1,600 more people needlessly died in these traffic accidents (Gigerenzer, 2006). These lives could have been saved had we not reacted to the dread risk as we did. We just do not seem to realize that it is far safer to fly than to drive. National Safety Council data reveal that you are 37 times more likely to die in a vehicle accident than on a commercial flight.* * --- To make changes to your subscription contact: Bill Southerly ([email protected])
