5. Must smoke greater than or equal to 10 cigarettes per day for at least two years, with urine cotinine levels of at least 100ng/ml and score on the Fagerstrom Test for Nicotine Dependence (FTND) must be greater than or equal to 2. Justification: The aim is to study phenomena that are linked to nicotine dependence and that occur with regular and frequent smoking. Assessment tool(s): Self-report, a urine cotinine test (smokers will be defined as having cotinine levels greater than or equal to 100ng/mL), and FTND test.