Inclusion Criteria:  Male and female smokers who are between 21 and 60 years of age and self-report smoking at least 5 cigarettes per day for at least the past 12 months. Smokers of primarily non-menthol cigarettes. Not currently undergoing smoking cessation treatment or trying to quit. Able to communicate fluently in English (speaking, writing, and reading). Capable of giving written informed consent.  Exclusion Criteria:  Subjects who self-report and/or present with the following criteria will not be eligible to participate in the study:  Smoking Behavior  Use of menthol cigarettes as preferred/regular brand (defined as using >20% of the time). Use of research cigarettes in the past 6 months (i.e., past 6-month participation in applicable previous CIRNA studies). Enrollment or plans to enroll in a smoking cessation program in the next month. Provide an initial Carbon Monoxide (CO) reading < 5 parts per million (ppm).  Alcohol/Drugs  History of substance abuse (other than nicotine) in the past 12 months and/or currently receiving medical treatment for substance abuse. Current alcohol consumption that exceeds 25 standard drinks/week.  Medical  Women who are pregnant, planning a pregnancy, and/or lactating. Any impairment including, but not limited to, visual, physical, and/or neurological impairments preventing the completion of procedures included within this protocol. Notable impairments will be evaluated by the PI and eligibility will be determined on a case-by-case basis. Color blindness. Serious or unstable disease within the past 12 months (e.g. heart disease, cancer). Applicable conditions will be evaluated by the Principal Investigator and eligibility will be determined on a case-by-case basis.  Psychiatric  As determined by self-report:  Lifetime history or current diagnosis of psychosis, bipolar disorder, and/or schizophrenia. Current diagnosis of major depression. Subjects with a history of major depression, in remission for 6 months or longer, are considered eligible.  Other  Additionally, participants may be deemed ineligible for any of the following general reasons at any point throughout the study, as well as during the initial telephone screen, at the discretion of the PI:  Significant non-compliance with protocol and/or study design. Past, current, anticipated, or pending enrollment in another research program over the study period that could potentially impact study data. Any medical condition, illness, disorder, adverse event (AE), or concomitant medication that could compromise participant safety or significantly impact study performance.