How reliable or truthful is the information?
Are there references for the information presented?
Is there a research methodology?
Has the information been reviewed in some manner?
Are there any spelling or grammatical errors?
In the database:
Look for keywords in the abstract to indicate what research methodology was used. You should also look for links to the references that have been cited.
Many databases make it easy for you to see what references have been cited in a particular study.
In the article:
Look for sections that clearly illustrate what research methodology was used in the study.
Taking a look at the publication:
Ulrich's Periodical Directory is a great resource to find out more information about a particular periodical. Journals marked with the referee shirt icon indicate that an article has been through the peer-review process.