Home›Psychometrics, Statistics and Methodology›Era of Origin›By Decade›1900sBrowse By1900sFacts1900sSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomy AuthorityWell-attestedAmerican Psychological Association PsycInfo Classification Categories and Codes (PsycINFO 19-group layer) 11900sFilter Results1 entryShow ResultsDifferential Psychology1900sSources1. 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.