This Comeback Bonus Increased Visits
Copies it for your coding agent, which checks the fit and builds it · The whole record, as markdown
A 125-point bonus (about $0.09) for the planned gym visit after a missed one added 0.40 weekly visits over four weeks: 27% above the placebo group's 1.48. Milkman et al. megastudy, 24 Hour Fitness members.
Direct research included. Read the findings and limits.
- 1 entry · direct research
- 1 entry · untested
From Milkman et al. megastudy, Duolingo, Strava
Overview
When someone misses a planned session or comes back after a long gap, make the return itself earn a small bonus: or open it into an easier session with a gift.
Coming back after a long gap can feel like starting over. Duolingo found about 5% of its daily users on a given day were returning after 30 or more days away, and they were roughly 20% less likely than new users to still be using the app 7 and 14 days later (Duolingo, 2017).
Fits when
- Products where users plan sessions, so a missed one can be detected
- Products that record the behaviour automatically, like a check-in
- Paying the bonus only for the planned session right after a miss, not as a higher payment on every session
Evidence & sources 2 entries
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Good to knowFit and evidence notes
- Fit to consider
- A reward that fires only after a miss could teach users to lapse in order to earn it. No source measures this, and none describes a limit on repeat eligibility.
- About the evidence
- The only outcome evidence is one megastudy of gym members over four weeks, with bonuses worth $0.09 and $0.16. The authors say top-performing estimates are probably inflated and need replication.
Copy includes 3 more limitations, 1 failure mode, the full evidence, and adaptation guidance.
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