Effect Size FAQs

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• Effect size is everything!

• Categories

  • effect size
  • effect size calculators
  • interpreting results
  • literature review
  • meta-analysis
  • p values
  • power analysis
  • sample size
  • statistical power
  • statistical significance
  • substantive significance
  • Type I error
  • Type II error
  • Uncategorized

• “The primary product of a research inquiry is one or more measures of effect size, not p values.”
  ~ Jacob Cohen

• How to manuals

  

• “Statistical significance is the least interesting thing about the results. You should describe the results in terms of measures of magnitude – not just, does a treatment affect people, but how much does it affect them.”
  ~ Gene Glass

• USEFUL LINKS

  • Effect size calculators
  • Effect size equations
  • The Result Whacker!

• “Investigators must learn to argue for the significance of their results without reference to inferential statistics.”
  ~ John P. Campbell

• “No economist has achieved scientific success as a result of a statistically significant coefficient.”
  ~ D. McCloskey and S. Ziliak

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