Articles in peer-reviewed/refereed journals are critically reviewed and evaluated by peer experts or scholars.
These "peer reviewers" are experts in the field and assess the quality of the methodology, data, analysis, findings, conclusions, and claims presented in the article and determine that the work is worthy of publication.
The library collects peer-reviewed/refereed journals to assist you in your research.
Information indicating if a journal is peer reviewed/refereed is often indicated within the publication.
One example can be found on SAGE's Journal of Early Childhood Literacy website
Most of the databases to which the library subscribes are either scholarly and peer reviewed or include tools which aid in limiting the data found to peer-reviewed/refereed journals.
One example of a database that does this is EBSCOHost:
Some publication websites include legends to help you detemine what articles are peer-reviewd or are from refereed journals. One such site that marks articles from refereed journals is Ulrich's Periodical Directory: