When evaluating resources you should consider the following areas:

EVALUATING GENERAL RESOURCES

Checking for Signs of Bias

• Does the author or publisher have political leanings or religious views that could affect objectivity?
• Is the author or publisher associated with a special-interest group, such as Greenpeace or the National Rifle Association, that might promote one side of an issue?
• Are alternative views presented and addressed? How fairly does the author treat opposing views?
• Does the author’s language show signs of bias?

Assessing an Argument

• What is the author’s central claim or thesis?
• How does the author support this claim — with relevant and sufficient evidence or with just a few anecdotes or emotional examples?
• Are statistics consistent with those you encounter in other sources? Have they been used fairly? Does the author explain where the statistics come from? (It is possible to “lie” with statistics by using them selectively or by omitting mathematical details.)
• Are any of the author’s assumptions questionable?
• Does the author consider opposing arguments and refute them persuasively?
• Does the author fall prey to any logical fallacies?

EVALUATING WEB RESOURCES

TIP: If the sponsorship and the authorship of a site are both unclear, think twice about using the site for your research.

• Is there an author? You may need to do some clicking and scrolling to find the author’s name. If you are on an internal page of a site, for example, you may need to go to the home page or click on an “about this site” link to learn the name of the author.
• If there is an author, can you tell whether he or she is knowledgeable and credible? When the author’s qualifications aren’t listed on the site itself, look for links to the author’s home page, which may provide evidence of his or her interests and expertise.

Sponsorship

• Who, if anyone, sponsors the site? The sponsor of a site is often named and described on the home page.
• What does the URL ending tell you? The URL often specifies the type of group hosting the site: commercial (.com), educational (.edu), nonprofit (.org), governmental (.gov), military (.mil), or network (.net). URLs may also indicate a country of origin: uk (United Kingdom) or jp (Japan), for instance.

Purpose and Audience

• Why was the site created: To argue a position? To sell a product? To inform readers?
• Who is the site’s intended audience? If you do not fit the audience profile, is information on the site still relevant to your topic?

Currency

• How current is the site? Check for the date of publication or the latest update.
• How current are the site’s links? If many of the links no longer work, the site may be too dated for your purposes.

• Does the author support the information he or she uses?
• Is the support respectable? 
• Does the page cite well-known sources or authorities?
• Does the page cite a variety of sources?
• Do other pages on the same topic cite some of the same sources?
• The web page in question should have a mix of internal links (links to web pages on the same site or by the same author) and external links (links to other sources or experts).
• If a web page makes it hard for you to check the support, be suspicious.

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Adapted from: dianahacker.com. 2006