Objective: To explore the feasibility and utility of a tolerance break (T-Break) guide on young adults' cannabis use. Participants: Young adults aged 18--29 (n = 125) who were current cannabis users. Methods: Participants recruited through posters and listservs at various universities were offered the T-Break Guide--daily activities, advice, and…

Alcohol and other drug (AOD) use problems among college students continue to represent a public health epidemic. In 2019, historically high rates of binge-drinking and marijuana use were reported among college-age adults, and the detrimental effects of excessive AOD use in college, such as poorer academic performance, sexual assault, injury or…

Objective: To compare physical activity (PA), sitting time, and substance use pre-COVID-19 and during COVID-19 pandemic among US college students. Participants: 484 students from a large Western university (20.6 ± 1.4 years, 80.0% female) were recruited. Methods: Self-reported online surveys were completed in June-August 2020. T-tests and…

Objective: Mindfulness-based stress reduction (MBSR) reduces anxiety among undergraduate students; however, there is limited evidence demonstrating mechanistic underpinnings. Theoretical models implicate cognitive self-regulation as a mechanism. This study explored whether an adapted MBSR embedded in a college course reduced anxiety and if…

Monitoring the Future (MTF) is an ongoing research program conducted at the University of Michigan's Institute for Social Research under a series of investigator-initiated research grants from the National Institute on Drug Abuse beginning in 1975. The integrated MTF study includes annual surveys of nationally-representative samples of 8th, 10th,…

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,…