Persuasive Technology Lab captology.stanford.edu Four Types of Credibility 1. Presumed Credibility 2. Reputed Credibility 3. Surface Credibility 4. Earned Credibility • It’s helpful to distinguish different types of credibility. • But you won’t find these distinctions in the psychology literature. #55 Prepared for Luke Wroblewski ©2003, BJ Fogg. Commercial use not allowed.