RecruitingBehavioural interventionOklahoma Study of Native American Pain Risk IV: Smoking Cessation and PainThe goal of this pilot study is to assess whether 4-weeks of verified smoking abstinence following financial incentive treatment for smoking cessation improves physiological markers of chronic pain risk in adult Native American smokers. The main aims to answer are: 1. Determine study feasibility. 2. Obtain effect sizes for changes in pain amplification and pain inhibition in abstinent vs non-abstinent Native Americans. 3. Obtain effect sizes for variables in the conceptual model of the Native American smoking-pain relationship.