To estimate the impact of the interactive narrative or Wanji game, we will conduct an individual-level block randomization. Randomization strata will be created based on language (Luganda, 4R, English), sex (male, female), and age (18-24, 25-34, 35-44, over 44) resulting in 24 blocks. Individuals will then be randomized within each strata into equal-sized control and treatment groups. The Wanji treatment will then be exposed to the treatment until take-up exceeds at least more than 50% or for five months.
Several strategies will be used to ensure intervention take-up: (i) treatment callers have the option of listening to the Wanji game or accessing other platform content in the opening menu, (ii) users will receive an incentive for completing each of the game's two levels, and (iii) weekly SMS encouragements will be sent to individuals. The minimum take-up target is 50%.
Roughly one month after the Wanji treatment ends, IVR reinforcement messages will be sent. To estimate the impact of the IVR reinforcement messages, we will conduct a second-level randomization of treatment group members. The same block randomization will be used as that for the first level to assign individuals into equal-sized control and IVR reinforcement treatment groups.