A primary community prevention approach in Iceland was associated with strong reductions of substance use in adolescents. Two years into the implementation of this prevention model in Chile, the aim of this study was to assess changes in the prevalence of adolescent alcohol and cannabis use and to discuss the impact of the COVID-19 pandemic on the…

Although research has established that school adjustment is associated with marijuana use (MU) in adolescence, few studies have tested these associations bidirectionally. Using random intercepts cross-lagged panel modeling, this study examined reciprocal associations between MU and school adjustment across 8th to 10th grade, including the…

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 spousal abuse, violence more generally, theft, suicide, and more;…

This volume presents new 2018 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 60. The authors report 2018 prevalence estimates on numerous illicit and licit substances, examine how substance use differs across this age span, 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 spousal abuse, violence more generally, theft, suicide, and more;…

Misbehaviour in high school impacts learning and instruction in the classroom as well as the educational climate of the institution. In this report, changes in administrators', teachers', and students' reports of misbehaviour between 1990 and 2002 were examined using two national US databases. There was little change in administrators'…

This study explored the relations between parental problem drinking, adolescent-parent communication, and adolescent psychosocial adjustment. Surveys were administered to a diverse sample of 683 15-17-years-old adolescents in the spring of 2007 and again in the spring of 2008. Results indicated that paternal problem drinking directly predicted…

Background: Chronotype refers to individuals' preference for morning or evening activities. Its two dimensions (morningness and eveningness) are related to a number of academic outcomes. Aims: The main goal of the study was to investigate the incremental validity of chronotype as a predictor of academic achievement after controlling for a number…

Background: Caffeine, the only licit psychoactive drug available to minors, may have a harmful impact on students' health and adjustment, yet little is known about its use or effects on students, especially from a developmental perspective. Caffeine use in 5th- and 10th-grade students was examined in a cross-sectional design, and relations and…

The Monitoring the Future (MTF) study involves an ongoing series of national surveys of American adolescents and adults that has provided the nation with a vital window into the important, but largely hidden, problem behaviors of illegal drug use, alcohol use, tobacco use, anabolic steroid use, and psychotherapeutic drug use. For more than a third…

Monitoring the Future (MTF), which is now in its 36th year, is a 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. The study is comprised of several ongoing series of annual surveys of nationally representative…

Investigated health behaviors practiced by 10th graders in Bogota, Colombia. Data from a modified version of the Youth Risk Behavior Survey indicated that there was a high use of gateway substances (tobacco and alcohol) among respondents, but lower usage, when compared to U.S. students, of other mind-altering substances such as marijuana,…

Since 1975, the Monitoring the Future (MTF) survey has annually studied the extent of drug use among high school 12th-graders. The survey was expanded in 1991 to include 8th- and 10th graders. It is funded by the National Institute on Drug Abuse (NIDA) and is conducted by the University of Michigan's Institute for Social Research. The goal of…

Risk and protective factor indices were developed to examine vulnerability to drug use among Latino high school students. Survey data was collected from 516 Latino 9th and 10th grade youth in the Los Angeles (California) area. Frequency and quantity of use data were collected for a range of drugs including inhalants, cocaine, and other hard drugs.…

Paper examines ethnic differences in licit and illicit drug use among American 8th, 10th, and 12th grade students, with a particular focus on girls. Across ethnic groups, drug use is highest among Native American girls and lowest among black and Asian American girls. Trend data suggest that girls' and boys' drug use patterns are converging.…