Peer reviewed articles are found in academic or scholarly journals. They are written by scholars and experts, but there is an extra step before publication: Other equally qualified scholars and experts review each article for accuracy and significance before it can be published in a peer reviewed journal.
Because of this more rigorous process, a peer reviewed article is considered to have the most value, even more than other scholarly articles.
To find peer reviewed articles, you generally need to have access to academic library databases. You can find some scholarly articles on Google scholar, some of which might be free, and some of which might be peer reviewed. The are much easier to find in an academic library database.
Example
Extracted from Detecting bias in meta-analyses of distance education research: big pictures we can rely on. (Must be on campus or have a COM account to view the entire article).
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