Home›Health and Mental Health Treatment and Prevention›Age FocusBrowse ByAge FocusFactsAge FocusSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomy AuthorityWell-attestedAmerican Psychological Association PsycInfo Classification Categories and Codes (PsycINFO 19-group layer) 1Age FocusAdolescenceAge Focus1 entryChildhoodAge Focus1 entrySources1. Wikipedia: PsycINFOtier 2WikipediaPsycINFO, Classification system sectionQuote, PsycINFO, Classification system sectionThe classification system consists of 22 major categories and 135 subcategories, and a list of codes.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.