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Effect Size FAQs

Research that matters, results that make sense

Contact Paul Ellis

April 28, 2011April 28, 2011Paul Ellis

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

“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

“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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