By Emma Young
In the summer of 2014, two videos were released that shocked the world. They showed the beheadings, by ISIS, of two American journalists – first, James Foley and then Steven Sotloff. Though the videos were widely discussed on TV, print and online news, most outlets did not show the full footage. However, it was not difficult to find links to the videos online. At the time, Sarah Redmond at the University of California, Irvine and her colleagues were already a year into a longitudinal study to assess psychological responses to the Boston Marathon Bombing, which happened in April 2013. They realised that they could use the same nationally representative sample of US adults to investigate what kind of person chooses to watch an ISIS beheading – and why. Their findings now appear in a paper published in American Psychologist.