Data were drawn from the Social-Emotional Contexts of Adolescent Smoking Patterns (SECASP) Study which has been described elsewhere (e.g., Dierker and Mermelstein, 2010). Briefly, sampling was conducted within high schools in the greater Chicago metropolitan area, and was designed to obtain a racially and ethnically diverse sample of adolescents who were at the earliest stages of smoking exposure. The final sample included 1,263 students across 16 high schools, and the current focus is on experimental and light smokers (N = 726 at baseline who had smoked in the past 90 days, but not more than 5 cigarettes/day and on a daily basis). Follow-up assessments were conducted at 6, 15, and 24 months following baseline. Though the full study also contains other smoking status groups and later assessment waves, for simplicity, the demonstrations presented below will be restricted to these observations.