Contingency management
All participants receive financial incentives based on biochemical verification of abstinence from tobacco during weekly visits. A set amount of $20 per sample (collected at each weekly visit) is delivered based on a negative qualitative urinary cotinine result (cut-off of 200 ng/ml). If remote sessions are conducted, participants are provided with take-home urine supplies to complete their instant-read test through video chats with research staff to verify results and provide incentives, if negative.