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Self-Report Habit Index variation based on the difference of rewards.
| Intervention duration | Variation | Intervention group, mean (SD) | Control group, mean (SD) | t(p) |
| Weeks 1 to 4 | ΔSRHIa (4–1) | 13.54 (14.99) | 6.42 (9.42) | 2.12 (.04) |
| Weeks 5 to 12 | ΔSRHI (12–5) | 12.08 (10.87) | 15.88 (13.29) | 0.21 (.21) |
aΔSRHI: change in Self-Report Habit Index.
