Clinical Research Directory

Inclusion Criteria: * Aged 21-34 years * Current nicotine EC user (defined as ≥ weekly use over the past 3 months) * Willing to provide informed consent and abstain from using any e-cigarette at least 12 hours prior to the three lab sessions * Read and speak English Exclusion Criteria: * Recently coronavirus disease 2019 (COVID-19) positive (defined as a positive test in the past 30 days) or a recent COVID-19 hospitalization (defined as a hospitalization within the past 6 months) * Unstable or significant psychiatric conditions (past and stable conditions will be allowed) * History of cardiac event or distress within the past 3 months * Have suffered from any serious lung disease or infection (e.g., tuberculosis, cystic fibrosis, or lung cancer) in the past 30 days * Are currently pregnant, planning to become pregnant, or breastfeeding (will be verified with urine pregnancy test) * Have hemophilia or another type of bleeding disorder * Are blind, severely visually impaired, deaf, hard of hearing, or have a severe motor disability