PsycINFO provides access to abstracts and citations to scholarly journal, book, and dissertation literature in the psychological, social, behavioral, and health sciences. PsycINFO contains more than 3 million records from 1600 to the present. Journal coverage, from the 1800’s to the present, includes material selected from over 2,500 periodicals, with 99% from peer-reviewed journals. Chapter and book coverage includes worldwide English-language material published from 1987 to the present; however, there are a substantial number of records covering books published earlier. Updated weekly.