APA PsycArticles® from the American Psychological Association (APA), is a definitive source of full-text, peer-reviewed scholarly and scientific articles in psychology. It contains content from journals published by the American Psychological Association (APA), its imprint the Educational Publishing Foundation (EPF), and from allied organizations including the Canadian Psychological Association and the Hogrefe Publishing Group. It includes all journal articles, book reviews, letters to the editor, and errata from each journal. Coverage spans 1894 to present; nearly all APA journals go back to Volume 1, Issue 1. APA PsycArticles® is indexed with controlled vocabulary from APA's Thesaurus of Psychological Index Terms®.