Service Alert
Evaluating the sources of the information you find, whether in print or digital format, is an essential aspect of doing research. The criteria for evaluation (relevance, accuracy, authority, purpose and timeliness) are interconnected. Take everything into account to determine how well the source addresses your specific needs. TRAAP is a useful way to remember the criteria.
This research guide is borrowed from Janice Hovis at St. Louis Community College Libraries.
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Evaluate each source of information using these five criteria:
How timely does the information need to be for your purpose? Some information changes rapidly, so you’ll need the most up-to-date and current sources. In other areas, older information is fine.
Is the information logical, well organized and supported by evidence?
Does the author quote statistics from a reliable source, refer to research studies, identify experts or include interviews with experts on the topic?
Is the material in line with other reputable sources, or does it diverge drastically?
An information source's context--where it came from, its audience, format, and how it is used--help determine authority, appropriateness and relevance.
A CRAB is another way to think about the evaluation criteria. It is basically the same as TRAAP, with Currency instead of Timeliness and Bias instead of Purpose.