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    • The Wiley Blackwell handbook of positive psychological interventions 

      C. Parks, Acacia; M. Schueller., Stephen (Wiley, 2014)
      When positive psychology was founded in the late 1990s, little work existed on interventions that aimed to increase happiness. Fordyce’s (1977, 1983) work was seminal in this domain but only a few studies dotted the ...