Corpus ID: 13447952

THE DODO BIRD VERDICT IS ALIVE

@inproceedings{Luborsky2003THEDB,
  title={THE DODO BIRD VERDICT IS ALIVE},
  author={Lester, Luborsky and Robert K. Rosenthal and Louis, Diguer and Tomasz P. Andrusyna and Jeffrey S Berman and Jill T. Levitt and David A. Seligman},
  year={2003}
}
17 meta-analyses have been examined of comparisons of active treatments with each other, in contrast to the more usual comparisons of active treatments with controls. These meta-analyses yield a mean uncorrected absolute effect size for Cohen’s d of .20, which is small and non-significant (an equivalent Pearson’s r would be .10). Its smallness confirms Rosenzweig’s supposition in 1936 about the likely results of such comparisons. In the present sample, when such differences are then corrected… Expand

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