Evaluating Sources: How Do you Know If It's Good Information?

Ask the following questions to find out if a resource is appropriate for your need:

Who? Who created this information - is it a member of the general public or an expert in the field?
Author/sponsor's name clearly given with qualifications and contact information?
For web, what is the URL - .edu, .org,  .ca, .com, .biz, etc.?
What? What kind of information is given - how relevant is it to your topic?
What is the scope of the coverage - is it a brief overview or does it cover a topic in-depth?
Is it narrowly focused or broader?
Is there a print equivalent to Web site that might provide more accurate or even more current information?
When? When was the information produced and/or updated?
Is it historical or current and is that important to your research?
Are the dates clearly indicated or easy to find?
Where? Where does the information contained in the site come from?
Are sources cited correctly? Can you verify the information given on the site elsewhere?
Why? Why was this information created?
Is it intended as a public service or is it an advertisement?
Is the information intended to sway public opinion or merely to inform?
Might the author/sponsor of the site have a bias?
For web pages, if advertising is present, is it separate from informational content or does it influence the content?