When deciding whether to use a source, ask...
Currency - Is the information current and up-to-date?
Relevance - Does this source contain a lot of useful information, or is it too basic, complex or unrelated to my topic?
Authority - Who is the author/publisher of this source and what are their qualifications? Are they an expert on this topic?
Accuracy - Is information supported by evidence? How has it been reviewed or fact-checked?
Purpose - What is the purpose of this source - to inform, entertain, persuade, sell, etc.? Is this purpose clear or is the author trying to hide something?
If in doubt, leave it out!
CRAAP test developed by Meriam Library, California State University, Chico.