[R] effect sizes

Dear all, I used the friedman.test.with.post.hoc in my analysis to compare the scores of three groups , but I would like to compute also the effect sizes. Anyone can help me? thank you net -- View this message in context: http://r.789695.n4.nabble.com/effect-sizes-tp3431058p3431058.html Sent

Re: [R] Effect sizes

t.test() does give effect sizes: that is, it gives the actual difference in means, and a confidence interval for this difference. If you want to standardize your effect sizes you will have to do this yourself. This is because the customs for standardization are different in different fields.

[R] Effect sizes

I'm just curious . . . if effect sizes are so important, and possibly a better way of looking at results than p-values, since they don't depend on effect size (Kline,2004; Murphy and Myors, 2004), why don't any of the classical tests, like t.test or glht specified for Tukey's posthocs, return