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Effect sizes for experimenting psychologists.

Ralph L Rosnow
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Abstract

This article describes three families of effect size estimators and their use in situations of general and specific interest to experimenting psychologists. The situations discussed include both between- and within-group (repeated measures) designs. Also described is the counternull statistic, which is useful in preventing common errors of interpretation in null hypothesis significance testing. The emphasis is on correlation (r-type) effect size indicators, but a wide variety of difference-type and ratio-type effect size estimators are also described.

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Ralph L Rosnow. 2003. Effect sizes for experimenting psychologists.. https://doi.org/10.1037/h0087427

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