![]() For several scenarios it will compute confidence intervals for d. Depending on the nature of your study, it allows you to compute Cohen’s d, Glass’ Δ, Hedges g, Cohen’s f, the Binomial Effect Size Display (BESD), Number Needed to Treat (NNT), odds ratio, risk ratio, and eta squared. This takes you to an (Title: effect size calculator at the German Psychometrica site) (This link open in new tab) effect size calculator at the German Psychometrica site (don’t worry-the page is in English). The calculator is tied to the book Practical Meta-Analysis by Mark W. For example, you can compute d by providing 30 different types of data: means and standard deviations, obtained t statistics and sample size, even mean-square errors, correlations, means, and sample size from ANCOVA. It is remarkably flexible, allowing users to input a wide variety of statistics to compute the desired index. In most cases, it also provides the 95% confidence interval for the index. Wilson’s online calculator that computes a variety of effect-size indices: Cohen’s d statistic, the correlation coefficients r and V, the odds ratio, and the risk ratio. Wilson’s online calculator) (This link open in new tab) Dr. ![]()
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