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Rules of thumb on magnitudes of effect sizes

Effect Size

Use

Small

Medium

Large

Correlation

0.1

0.3

0.5

R-squared

regression inc anovas

0.01

0.06

0.14

Cohen's f

regression inc anovas

0.1

0.25

0.40

Cohen's d

t-tests

0.2

0.5

0.8

Cohen's w

chi-square

0.1

0.3

0.5

'Definitions'

$$\mbox{Cohen's f} = \sqrt{Rtext{2} / 1 - Rtext{2}}

None: FAQ/effectSize (last edited 2021-11-30 08:52:14 by PeterWatson)