title: Daily Reports of Positive and Negative Affect and Alcohol and Marijuana Use Among College Student and Nonstudent Young Adults.
abstract: BACKGROUND
  Daily affect and substance use covary among college students, but little is known about these associations among young adults not in college.
  
  
  OBJECTIVE
  The current pilot study examines associations between positive and negative affect and alcohol and marijuana use, with a focus on differences between college student and nonstudent young adults.
  
  
  METHODS
  High school seniors completed a baseline survey during the spring of 2012 and were then randomly selected to participate in an intensive measurement follow-up. Participants in the follow-up (N = 72, 40.3% men, 77.8% White, 66.7% full-time college students) completed up to 14 consecutive web-based daily surveys during the fall after high school completion. Multilevel models in which days (Level 1) were nested in persons (Level 2) were estimated.
  
  
  RESULTS
  Weekend days were associated with increased alcohol use among all young adults, increased marijuana use among college students, and decreased marijuana use among nonstudents. For young adults not in college, greater daily positive affect was associated with increased likelihood of binge drinking, consuming a greater number of drinks, and lower odds of marijuana use; greater daily negative affect was associated with lower odds of alcohol use and lower odds of binge drinking for non-students. For college students, greater daily negative affect was associated with lower odds of marijuana use.
  
  
  CONCLUSIONS
  Daily affect and alcohol and marijuana use covary among young adults, though these associations differ between students and non-students. Results highlight the need to examine predictors of alcohol and marijuana use among young adults who do not attend college.
authors.affiliation: a Institute for Social Research , University of Michigan , Ann Arbor , Michigan , USA.
authors.forename: Megan E
authors.initials: ME
authors.lastname: Patrick
authors.affiliation: b Department of Educational Studies , The Ohio State University , Columbus , Ohio , USA.
authors.forename: Gloria
authors.initials: G
authors.lastname: Yeomans-Maldonado
authors.affiliation: a Institute for Social Research , University of Michigan , Ann Arbor , Michigan , USA.
authors.forename: Jamie
authors.initials: J
authors.lastname: Griffin
mesh_terms: D000293:Adolescent; D000428:Alcohol Drinking; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse; D015146:Midwestern United States; D057566:Self Report; D013334:Students / Q000523:psychology*; D014495:Universities
keywords: Alcohol; college; marijuana; positive and negative affect; young adult