About This Applet

This web applet calculates the minimum sample size necessary for a Micro Randomized Trial with continuous proximal outcome.

How can a behavioral scientist use this applet?

Behavioral intervention scientists can use this code to calculate the sample size for an MRT with a continuous proximal outcome.

What method does this applet implement?

This code implements a sample size formula based on a test of the null hypothesis that the proximal effect (possibly a function of time) is zero. The method includes multiple small sample adjustments.

Related References

1. Seewald, N. J., Sun, J., & Liao, P. (2016). MRT-SS Calculator: An R shiny application for sample size calculation in micro-randomized trials. arXiv preprint arXiv:1609.00695.

2. Liao, P., Klasnja, P., Tewari, A., & Murphy, S. A. (2016). Sample size calculations for micro-randomized trials in mHealth. Statistics in medicine, 35(12), 1944–1971. https://doi.org/10.1002/sim.6847

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