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Two-tailed analyses
| Alpha (%) | ES | Dropout rate (%) | Final total sample size (four groups) | |
| Power of 80% | 5 | 0.78 | 15 | 124 |
| Power of 85% | 5 | 0.78 | 15 | 142 |
| Power of 90% | 5 | 0.78 | 15 | 165 |
| Power of 80% | 5 | 0.78 | 20 | 130 |
| Power of 85% | 5 | 0.78 | 20 | 148 |
| Power of 90% | 5 | 0.78 | 20 | 172 |
ES, effect size.
