• DOI:10.1037/0003-066X.49.12.997
Corpus ID: 380942

The earth is round (p < .05)

@article{Cohen1994TheEI,
  title={The earth is round (p < .05)},
  author={J. Cohen},
  journal={American Psychologist},
  year={1994},
  volume={49},
  pages={997-1003}
}

• J. Cohen
• Published 1994
• Psychology
• American Psychologist

After 4 decades of severe criticism, the ritual of null hypothesis significance testing (mechanical dichotomous decisions around a sacred .05 criterion) still persists. This article reviews the problems with this practice, including near universal misinterpretation of p as the probability that H₀ is false, the misinterpretation that its complement is the probability of successful replication, and the mistaken assumption that if one rejects H₀ one thereby affirms the theory that led to the test… Expand

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