Library 10: Information Research -- Evaluating your sources: Guidelines for printed works

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The responsibility for evaluating the print resources you use falls on your shoulders. Here are some questions you can ask yourself, so you end up spending your precious time on using quality materials.

"I read it in a book [a newspaper, a magazine] so it must be true!"

Information originates from some person, group, government agency or other entity. Prior to being printed, publications are reviewed by editors who apply a variety of writing and accuracy standards. The standards vary -- those applied by editors at the New York Times differ from those applied by editors of a supermarket tabloid, for example. Books on the same topic by different authors, and published by different publishers, can vary a great deal not only in point of view, of course, but also as to their overall quality.

Print resources don't come labelled as to their quality. You're the one who has to sort all this out.

It is up to you to determine if the information you've found is both useful and of high quality. Your own perceptions about information, and your own reactions to the style in which the information is presented, can help you select good resources.

As you judge the quality of specific printed resources, keep the following questions in mind:

Coverage

  • What does this work offer that is not found elsewhere?
  • What is its value to your research?
  • Is the coverage in-depth or superficial?
  • Is the material well-written, or haphazard and difficult to understand?

Objectivity

  • Does the information presented show bias?
  • Is the source designed to sway opinion?

Authorship

  • Who is responsible for the content? Is the author qualified? an expert?
  • What is the author's organizational affiliation? Is the organization impartial, like a university, or is it established to promote an idea or point of view, like the National Rifle Association?
  • Is the author making an argument for personal gain? Is the material written objectively (presenting both sides fairly ), or from a subjective bias (expressing one point of view)?
  • Did the author gather information from original research, direct personal observations, or from books and articles written by others? (The question of primary vs. secondary sources.)

Currency

  • Is the information current? Do you need current information for your topic?

Accuracy

  • Is the information reliable and error-free?
  • Is there someone you can contact to learn more about the information presented?
  • Are the sources for the information clearly identified and verifiable?

Want to read more about evaluation? Critically Analyzing Information Sources, a Web site from Cornell University Libraries, provides some good information.