Minimum detectable effect size for main outcomes (accounting for sample
design and clustering)
We decided to collect a maximum of 808 participants, while considering our budget constraints. Using d = 0.36 in the meta-analysis (Luong et al., 2021), the sample size for each group becomes 202 with alpha = 0.05 and power = 0.95.
Luong, M. L. N., Hall, M., Bennell, K. L., Kasza, J., Harris, A., & Hinman, R. S. (2021). The impact of financial incentives on physical activity: a systematic review and meta-analysis. American Journal of Health Promotion, 35(2), 236-249.