After the earthquake and tsunami, most participants (64.9%) had increased their media consumption. The amount of television and Internet viewing correlated both with symptoms of peritraumatic distress and dissociation (r>0.22 and p<0.001 in all cases) and with disruptive nocturnal behavior (r>0.17 and p<0.001 in all cases), while 45% of the participants reported at least one disruptive nocturnal behavior. Being female, knowing someone in Japan, and figuring in the amount of time spent on the Internet each predicted at least one disruptive nocturnal behavior in a logistic regression (Table 1). In the second step, peritraumatic dissociation and distress significantly predicted disruptive nocturnal behavior; however, the time spent on the Internet became nonsignificant, suggesting a mediating effect of peritraumatic reactions. This was confirmed by a multiple mediator analysis revealing that the direct effect of Internet viewing on disruptive nocturnal behavior was not significant, while indirect effects through both peritraumatic distress and dissociation were significant (p<0.05), suggesting that peritraumatic reactions might explain the relationship between Internet exposure and disruptive nocturnal behavior. Replicating the analyses separately by country yielded similar results. As a follow-up, in a subsample reassessed 2 months later (109 individuals who provided their e-mail addresses), similar analyses examining predictors of posttraumatic stress symptoms (5) revealed a significant effect of Internet viewing that was mediated by peritraumatic reaction.