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“... Nix et al. (1999) showed in experimental studies that whereas task success can produce happiness, only success at autonomously motivated tasks maintained or enhanced vitality. Finally, in new research, Bernstein and Ryan (2001) argued that subjective vitality can be affected by contact with nature.” — Christopher Peterson
... Nix et al. (1999) showed in experimental studies that whereas task success can produce happiness, only success at autonomously motivated tasks maintained or enhanced vitality. Finally, in new research, Bernstein and Ryan (2001) argued that subjective vitality can be affected by contact with nature.