Home›Clinical Psychology›Era (Birth Year)›By Century›20th centuryBrowse By20th centuryFacts20th centurySourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1896 120th centuryFilter Results16 entriesBranch of PsychologyAllClinical Psychology (11)Counseling Psychology (1)Social Psychology (2)Nationality / CultureAllArgentina (1)Austria (1)United States (14)Principal TheoryAllBeck's Cognitive Theory of Depression (1)Relational Frame Theory (1)Terror Management Theory (1)Show ResultsBrowseCompareSelect all 16Aaron Beck20th centuryAlbert Ellis20th centuryBoris M. Levinson20th centuryCarl Rogers20th centuryDavid Rosenhan20th centuryEnrique Pichon-Riviere20th centuryErnest Becker20th centuryKaren Machover20th centuryMartin Seligman20th centuryMary L. Trump20th centuryMolly Harrower20th centuryNancy Chodorow20th centuryPaul Ekman20th centuryRollo May20th centurySteven C. Hayes20th centuryViktor Frankl20th centurySources1. 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.