A meta-analysis of outcome studies comparing bona fide psychotherapies: Empiricially, "all must have prizes."

  title={A meta-analysis of outcome studies comparing bona fide psychotherapies: Empiricially, "all must have prizes."},
  author={B. Wampold and G. Mondin and M. Moody and Frederick A. Stich and K. Benson and Hyun-nie Ahn},
  journal={Psychological Bulletin},
  • B. Wampold, G. Mondin, +3 authors Hyun-nie Ahn
  • Published 1997
  • Psychology
  • Psychological Bulletin
  • This recta-analysis tested the Dodo bird conjecture, which states that when psychotherapies intended to be therapeutic are compared, the true differences among all such treatments are 0. Based on comparisons between treatments culled from 6 journals, it was found that the effect sizes were homogeneously distributed about 0, as was expected under the Dodo bird conjecture, and that under the most liberal assumptions, the upper bound of the true effect was about .20. Moreover, the effect sizes (a… CONTINUE READING
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