The magical number .7 +/- .2: meta-meta-analysis of the probability of superior outcome in comparisons involving therapy, placebo, and control.

@article{Grissom1996TheMN,
  title={The magical number .7 +/- .2: meta-meta-analysis of the probability of superior outcome in comparisons involving therapy, placebo, and control.},
  author={R J Grissom},
  journal={Journal of consulting and clinical psychology},
  year={1996},
  volume={64 5},
  pages={973-82}
}
  • R J Grissom
  • Published 1996 in Journal of consulting and clinical psychology
The "probability of superiority estimate" (PS) estimates the probability that a randomly sampled client from a population given a treatment will have an outcome that is superior to that of a randomly sampled client from a population given another treatment. The meta-analytic clinical outcome literature was examined to calculate mean PS (PS) for comparisons involving therapy versus control, therapy versus placebo, therapy versus therapy, and placebo versus control. The range of PS was found to… CONTINUE READING

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