Authorship means the Web sites should present the information about authors, such as the author's qualifications which are relevant to the content, contact information, and copyright. Furthermore, they should present sponsoring institutions. Content validity means how reliable and free from error the information is. There are many criteria to evaluate the content validity, including currency, coverage, linking, and freedom from bias. The first criterion is currency.
Currency refers to the timeliness of information.
Consumers should consider how often that Web site is updated. The next criterion is coverage. This means that content should cover topics that are related to the CAI objectives, and are deep enough for its target. Therefore, good Web sites should clearly present objectives, theme, and original content. Another criterion is linking.