| Summary: | Qualities that make a person persuasive have been well-studied in the persuasion literature, typically considering such qualities as credibility, expertise, attractiveness, similarity, or likeability (Briñol & Petty, 2006; Chaikan, 1980; Maddux & Rogers, 1980; Pornpitakpan, 2004). Work manipulating written messages has additionally assessed the persuasive impact of various message frames (e.g., positive or negative frame), message relevance, and high or low argument quality (Briñol & Petty, 2006; Smith & De Houwer, 2014). By manipulating aspects of persuasive content, the field has gained tremendous knowledge regarding the influence of different qualities (such as credibility or attractiveness), and the ways in which these qualities engage a targets information processing routes.
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