Negative misconceptions about disaster behaviour through availability cascades: An examination of secondhand information and the moderating effect of trait anxiety on disaster myths

The present study was designed to shed light on the origin of disaster myths, such as panic, looting, crime, and psychological shock in postdisaster situations, by examining effects of secondhand information and the moderating effect of anxiety on such negative misconceptions. It was hypothesized that secondhand information on disaster behaviour, such as media reports and word‐of‐mouth rumours, and trait anxiety would increase the degrees to which people gave credit to four popular disaster myths. Also, trait anxiety was predicted to moderate the association between information sources and disaster myths. Questionnaire data obtained from 1,500 Japanese participants indicated that people relying on secondhand information gave more credit to all the four misconceptions than those relying on firsthand information such as direct disaster experience. However, trait anxiety was not found to significantly affect the degrees of the disaster myths. Furthermore, the moderating effect of trait anxiety on the association between the information sources and the disaster myths was not observed in any of the four myths. The present results imply that although reliance on secondhand information increases the degree of disaster myths to some extent, there should be other causes from which disaster myths originate.