Background: The Theory of Triadic Influence (TTI) provides a comprehensive framework for understanding adolescent substance use. Objectives: We examined mechanisms by which a TTI-guided social-emotional and character development program, "Positive Action" (PA), influences adolescent substance use. Study data come from the PA-Chicago,…

Monitoring the Future (MTF) is a long-term study of substance use and related factors among U.S. adolescents, college students, and adult high school graduates through age 55. It is conducted annually and supported by the National Institute on Drug Abuse. MTF findings identify emerging susbstance use problems, track substance use trends, and…

Substance use is a leading cause of preventable morbidity and mortality; it is in large part why, among 17 high-income nations, people in the U.S. have the highest probability of dying by age 50. Substance use is also an important contributor to many social ills including child and spouse abuse, violence more generally, theft, suicide, and more;…

The present volume presents new 2017 findings from the U.S. national Monitoring the Future (MTF) follow-up study concerning substance use among the nation's college students and adults from ages 19 through 55. The authors report 2017 prevalence estimates on numerous illicit and licit substances, examine how substance use differs across this age…

The promoting responsibility through education and prevention (PREP) program is an after school substance abuse and violence prevention program for at-risk fourth and fifth grade youths in St. Louis, Missouri. Staffed by licensed clinical social workers and professional volunteers, PREP offers cultural cooking classes, yoga, and art as well as…