Home›Clinical Psychology›Era (Birth Year)›By Decade›1920sBrowse By1920sFacts1920sSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1896 11920sFilter Results3 entriesBranch of PsychologyAllClinical Psychology (2)Nationality / CultureAllUnited States (3)Principal TheoryAllBeck's Cognitive Theory of Depression (1)Terror Management Theory (1)Show ResultsBrowseCompareSelect all 3Aaron Beck1920sDavid Rosenhan1920sErnest Becker1920sSources1. Wikipedia: Clinical psychologytier 2WikipediaClinical psychology, History sectionQuote, Clinical psychology, History sectionThe field is generally considered to have begun in 1896 with the opening of the first psychological clinic at the University of Pennsylvania by Lightner Witmer.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.