r(equivalent): A Simple Effect Size Indicator

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r(equivalent): A Simple Effect Size Indicator

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Title: r(equivalent): A Simple Effect Size Indicator
Author: Rubin, Donald B.; Rosenthal, Robert

Note: Order does not necessarily reflect citation order of authors.

Citation: Rosenthal, Robert, and Donald B. Rubin. 2003. r(equivalent): A simple effect size indicator. Psychological Methods 8, no. 4: 492-496.
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Abstract: The purpose of this article is to propose a simple effect size estimate (obtained from the sample size, N, and a p value) that can be used (a) in meta-analytic research where only sample sizes and p values have been reported by the original investigator, (b) where no generally accepted effect size estimate exists, or (c) where directly computed effect size estimates are likely to be misleading. This effect size estimate is called r(equivalent) because it equals the sample point-biserial correlation between the treatment indicator and an exactly normally distributed outcome in a two-treatment experiment with N/2 units in each group and the obtained p value. As part of placing r(equivalent) into a broader context, the authors also address limitations of r(equivalent).
Published Version: http://dx.doi.org/10.1037/1082-989X.8.4.492
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:3199068
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