|Using Effect Size—or Why the P Value Is Not Enough
|Year of Publication
|Gail M. Sullivan, MD, M. P. H., & Richard Feinn, P. D.
|Journal of Graduate Medical Education
|These statements about the importance of effect sizes were made by two of the most influential statistician-researchers of the past half-century. Yet many submissions to Journal of Graduate Medical Education omit mention of the effect size in quantitative studies while prominently displaying the P value. In this paper, we target readers with little or no statistical background in order to encourage you to improve your comprehension of the relevance of effect size for planning, analyzing, reporting, and understanding education research studies.