While Twitter provides an unprecedented opportunity to learn about breaking news and
current events as they happen, it often produces skepticism among users as not all the
information is accurate but also hoaxes are sometimes spread. While avoiding the diffusion
of hoaxes is a major concern during fast-paced events such as natural disasters, the study of
how users trust and verify information from tweets in these contexts has received little
attention so far. We survey users on credibility perceptions regarding witness pictures …