Effect Size: Cohen's d, eta², r and f (Interpretation Guide)

Complete guide to effect size: what it is, when to use Cohen's d, eta squared, Pearson r or Cohen's f, reference tables for small/medium/large effects, and how to report them in APA. With free calculator.

Keep reading

• How to Calculate the Sample Size of Your Study (G*Power) Step by Step
• Post-hoc Statistical Power: Why It's Invalid (and What to Do)
• Farewell to the Tyranny of the p-Value: Reporting Effect Sizes
• Automating Statistical Tables: From Output to Final Manuscript

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