Defined as “the judgments made by a perceiver concerning the believability” of the source (O’Keefe, 2002, p. 181), the concept of source credibility is rooted in the communication and persuasion literature. To date, various dimensions of credibility have been proposed across the literature, including trustworthiness, expertise, dynamics, attractiveness, sociability, and likeability. Most definitions, however, refer to the two most commonly discussed aspects: trustworthiness and expertise.