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 posted on Twitter related to Hurricane Sandy. By examining credibility perceptions on features suggested for information verification in the field of Epistemology, we evaluate their accuracy in determining whether pictures were real or fake compared to professional evaluations performed by experts. Our study unveils insight about tweet presentation, as well as features that users should look at when assessing the veracity of tweets in the context of fast-paced events. Some of our main findings include that while author details not readily available on Twitter feeds should be emphasized in order to facilitate verification of tweets, showing multiple tweets corroborating a fact misleads users to trusting what actually is a hoax. We contrast some of the behavioral patterns found on tweets with literature in Psychology research.
  As more of our communication, commerce, and personal data goes online, credibility becomes an increasingly important issue. How do we determine if our e-commerce sites, our healthcare sites, or our online communication partners are credible? This paper examines the research literature in the area of web credibility. This review starts by examining the cognitive foundations of credibility. Other sections of the paper examine not only the general credibility of web sites, but also online communication, such as e-mail, instant messaging, and online communities. Training and education, as well as future issues (such as CAPTCHAs and phishing), will be addressed. The implications for multiple populations (users, web developers, browser designers, and librarians) will be discussed. This study surveyed Weblog users online to investigate how credible they view blogs as compared to traditional media as well as other online sources. This study also explores the degree to which reliance on Weblogs as well as traditional and online media sources predicts credibility of Weblogs after controlling for demographic and political factors. Weblog users judged blogs as highly credible—more credible than traditional sources. They did, however, rate traditional sources as moderately credible. Weblog users rated blogs higher on depth of information than they did on fairness. Little of the work on online credibility assessment has considered how the information-seeking process figures into the final evaluation of content people encounter. Using unique data about how a diverse group of young adults looks for and evaluates Web content, our paper makes contributions to existing literature by highlighting factors beyond site features in how users assess credibility. We find that the process by which users arrive at a site is an important component of how they judge the final destination. In particular, search context, branding and routines, and a reliance on those in one’s networks play important roles in online information-seeking and evaluation. We also discuss that users differ considerably in their skills when it comes to judging online content credibility. Subjects rated how certain they were that each of 60 statements was true or false. The statements were sampled from areas of knowledge including politics, sports, and the arts, and were plausible but unlikely to be specifically known by most college students. Subjects gave ratings on three successive occasions at 2-week intervals. Embedded in the list were a critical set of statements that were either repeated across the sessions or were not repeated. For both true and false statements, there was a significant increase in the validity judgments for the repeated statements and no change in the validity judgments for the non-repeated statements. Frequency of occurrence is apparently a criterion used to establish the referential validity of plausible statements. People increasingly rely on Internet and web-based information despite evidence that it is potentially inaccurate and biased. Therefore, this study sought to assess people's perceptions of the credibility of various categories of Internet information compared to similar information provided by other media. The 1,041 respondents also were asked about whether they verified Internet information. Overall, respondents reported they considered Internet information to be as credible as that obtained from television, radio, and magazines, but not as credible as newspaper information. Credibility among the types of information sought, such as news and entertainment, varied across media channels. Respondents said they rarely verified web-based information, although this too varied by the type of information sought. Levels of experience and how respondents perceived the credibility of information were related to whether they verified information. This study explores the social relevance of the findings and discusses... In this study 2,684 people evaluated the credibility of two live Web sites on a similar topic (such as health sites). We gathered the comments people wrote about each siteis credibility and analyzed the comments to find out what features of a Web site get noticed when people evaluate credibility. We found that the idesign looki of the site was mentioned most frequently, being present in 46.1 of the comments. Next most common were comments about information structure and information focus. In this paper we share sample participant comments in the top 18 areas that people noticed when evaluating Web site credibility. We discuss reasons for the prominence of design look, point out how future studies can build on what we have learned in this new line of research, and outline six design implications for human-computer interaction professionals.