PsycInfo is the American Psychological Association's resource for abstracts of scholarly journal articles, book chapters, books, and dissertations. It is the largest resource devoted to peer-reviewed literature in behavioral science and mental health. Ninety-nine percent of its content is peer-reviewed. Included is information on the psychological aspects of related fields such as medicine, psychiatry, nursing, sociology, education, pharmacology, technology, linguistics, anthropology, business, law and others. Journal coverage, which spans from the 1800s to the present, includes international material selected from around 2,500 periodicals.