Need to test your assumptions before designing a micro-randomised trial (MRT)?
Explore how key design choices shape your study. Adjust assumptions about sample size, study duration, decision frequency, randomisation probability, and expected effect size to see how they influence the number of decision points, treatment allocations, and statistical power. The MRT Design Explorer provides an interactive way to understand the implications of your design decisions before moving from concept to implementation.
The demonstration below uses a just-in-time adaptive intervention (JITAI) aimed at reducing sedentary behaviour among people with type 2 diabetes, illustrating how intervention delivery, repeated randomisation, and proximal outcomes come together within an MRT.