This video, created by the North Carolina State University Libraries, is a concise explanation of what peer reviewing is and the role it plays in publishing. Closed-captioning is available for this tutorial.
Peer Review in Three Minutes (3:15)
How do I know if a journal is peer reviewed?
Some article databases allow you to limit to peer-reviewed journals when searching. If you cannot limit to peer-reviewed journals, use the Ulrichsweb database to look up the title of the journal. Ulrichsweb will show whether a journal is "refereed," which is another word for peer review. Access to this database is restricted to UW-Whitewater students, faculty, and staff.
Remember, not all articles in peer-reviewed journals go through the peer-review process. Once you find an article in a peer-reviewed journal, you must then determine if the article is scholarly. If the article is scholarly, and it is in a peer-reviewed journal, then that article was peer reviewed.