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Required sample size to detect a mediated effect with power of .80 in a single mediator model with dichotomous treatment assignment
|
b path |
|||
|---|---|---|---|
| a path | small (.14) | medium (.39) | large (.59) |
| small (.2) | 640 | 404 | 394 |
| medium (.5) | 450 | 92 | 66 |
| large (.8) | 512 | 76 | 42 |
Note. c’ path is held constant at .28, because it does not influence the power of the mediated effect (ab)
