Contingency management promotes smoking reductions in residential substance abuse patients.

The team worked with the adults in a live-in drug-treatment program. Half got the usual care. The other half could win prizes for breath samples that showed no smoke.

Each clean test earned a draw from a fish-bowl. Prizes ranged from a dollar to 100 dollars. The study ran eight weeks and used simple before-and-after counts.

The prize group gave three times more clean breath tests than the usual-care group. They also stayed smoke-free for longer streaks—up to four weeks straight.

Even small one-dollar prizes kept people trying. The biggest gains came in the first two weeks.

Leigh et al. (2015) later asked, "Does the prize have to grow each week?" They paid cash that escalated from five to 33 dollars. Escalating cash worked better than a flat rate, but both studies show money for clean tests beats no money.

Redner et al. (2018) trimmed the deal to just three weeks plus short talks. One smoker still quit for good. Together the papers say: shorter, cheaper, or escalating—all forms of contingency management beat zero incentives.

Bryant et al. (1984) did the first test, paying methadone patients for clean urine. Their effects faded when the money stopped. Geurts et al. (2008) saw the same pattern, showing the field still needs plans to keep gains after prizes end.

If you run a residential SUD program, add a prize bowl. One dollar tokens tripled abstinence rates in eight weeks. Start with frequent draws, then thin the schedule as clients rack up clean tests. Track breath CO daily so wins feel real.