“…One such rule is the "availability heuris tic" (Tversky & Kahneman, 1973) (Kahneman et al, 1982;Nisbett & Ross, 1980;Sherman, Judd, & Park, 1989). In particular, this heuristic has been used to explain why certain risks are overestimated (e.g., Lichtenstein, Slovic, Fischoff, Layman & Combs, 1978;Slovic, Fischhoff & Lichtenstein, 1977, Weinstein, 1989.…”