Persuasive Technology Lab captology.stanford.edu Stanford Web Credibility Surveys • Overview of studies – Study conducted two times: 1999 and 2002 – People evaluated the credibility impact of different website elements. – e.g., contact phone number, pop-up ad, etc. – Over 3,000 people participated from U.S. & Europe. #33 Prepared for Luke Wroblewski ©2003, BJ Fogg. Commercial use not allowed.