Home›Clinical Psychology›Era (Birth Year)›By Decade›1940sBrowse By1940sFacts1940sSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1896 11940sFilter Results3 entriesBranch of PsychologyAllClinical Psychology (2)Social Psychology (1)Nationality / CultureAllUnited States (3)Principal TheoryAllRelational Frame Theory (1)Show ResultsBrowseCompareSelect all 3Martin Seligman1940sNancy Chodorow1940sSteven C. Hayes1940sSources1. 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.