Consider these factors when evaluating a source:
Credibility
Who is the author? Are any
credentials given? Who is the publisher? If you can't tell or if there
isn't any clear information, be suspicious. For web sites, you often
have to check the home page or the "About Us" page to find who is behind
a source.
Point of View or Bias
There's nothing wrong with
a source having a point of view, but you need to be aware of it so you
can investigate the other sides. Example: Information on gun control
from the National Rifle Association.
Timeliness
Think about your topic and how
important recent information is to it. For an art history project, it
probably isn't very important. For a paper on genetic engineering, it is
very important.
Accuracy
This is the ultimate point. But you may
not know enough about a topic to judge. Look for solid evidence, such as
research studies and statistics. Is there a bibliography or references
to other sources the author used? These indicate the information is
based on research rather than just opinion.