Table 1 “Rules of thumb for interpreting effect sizes”
From: Application of standardised effect sizes to hospital discharge outcomes for people with diabetes
Cohen’s d | Phi Coefficent | ||
|---|---|---|---|
Effect Size | d value | Effect Size | d value |
Very small | 0.01 | Negligible | 0.00 to < 0.10 |
Small | 0.2 | Weak | 0.10 to < 0.20 |
Medium | 0.5 | Moderate | 0.20 to < 0.40 |
Large | 0.8 | Relatively strong | 0.40 to < 0.60 |
Very large | 1.2 | Strong | 0.60 to < 0.80 |
Huge | 2 | Very strong | 0.80 to < 1.00 |