Results of regressing intention to get vaccinated against COVID-19 on communication about the need for high uptake and payments for being vaccinated
| Predictor | b | SE | CI− | CI+ |
| (Constant) | 4.46 | 0.18 | 4.106 | 4.805 |
| Communication (baseline: no communication) | −0.34 | 0.25 | −0.838 | 0.152 |
| Payment (baseline: no payment) | 0.22 | 0.21 | −0.189 | 0.619 |
| Communication × Payment | −0.05 | 0.29 | −0.619 | 0.524 |
None of the predictors was significant. A priori power analyses revealed a power >0.95 to detect a small effect (f2=0.05). R2=0.01, adjusted R2=0.01. CI− and CI+ are the lower and upper bonds of the 95% confidence intervals.