Scholarly (aka academic) articles are written by and for academics, researchers, and experts in the specific topic or broader subject area of the article.
Peer reviewed (aka refereed) articles are those which have been reviewed prior to publication by other experts in the topic of the article. Often reviewers are external (not members of the journal's editorial staff or board).
PsycINFO records indicate whether the article is from a peer reviewed journal; see Publication Type field near bottom of record.
In addition to articles, other types of publications you may come across: