Before being published, articles are reviewed by experts in the field who decide whether the article is adding to the body of knowledge in the field. This process is called peer review. Most scholarly articles are peer-reviewed.
"Scrutinizing Science: Peer Review." Understanding Science. University of California Museum of Paleontology. 19 November 2013 <http://undsci.berkeley.edu/article/0_0_0/howscienceworks_16>.