Evaluate the credibility of the author of your source. A signed article gains value from its creator. For example, the article has more authority if the writer has education or work experience in the field. If other sources cite the author, this also indicates a recognized expert. Research the author in "Who's Who" or other sources to find her credentials if the source doesn't provide them. Affiliation with a well-known organization in the field adds to the author's credibility.
The publication date shows how current the information is. Being current is important for economic data, for example. Older information is less devalued for historical research or literary criticism. Older information also may reflect a school of thought that has gone out of favor.
Examine the goals of the publishing organization to help determine bias. For example, a lobbying group, professional organization and university press have different purposes. A well-respected publisher adds weight to the material.
Evaluate the material to help determine the credibility of the source. A primary source, such as a historical document, is normally a quality source. Secondary sources demonstrate reliability when their information agrees with primary sources and with other secondary sources. A clear and logical writing style also characterizes a strong resource because it also shows professionalism.
Determine the point of view or bias of the article. A slanted source still can be valuable because it may have good, detailed information. However, expect quality text to cover the subject in depth and with detail.
Print articles also published online have the same credibility in both formats. Begin your examination of Web-only articles using the same criteria as for print work. Look for the site sponsor in the URL and on the homepage. Look for the author's name and credentials and publication date. Some of these important facts are missing frequently. Find out whether the site's main purpose is marketing or political, thus showing bias. Information is more credible if an educational institution or other reliable organization sponsors the site. Evaluate the content for writing quality and uniqueness. Check whether information actually updates when the date changes. Look for citing of sources and links to other reputable sites. Evaluate the readability, graphics, and hardware and software requirements of the site. Examine whether the site has a logical layout and is easy to navigate.