FRANÇAIS :
Le rapport donne les résultats de l'enquête de 2006 auprès des élèves de 4ème, de seconde et de terminale. Les résultats portent sur les consommations de drogues licites et illicites mais aussi sur les niveaux de perceptions des risques associés à ces consommations, la désapprobation envers les expérimentateurs et la perception de la difficulté à se procurer des produits. L'échantillon de 2006 représente 548 500 adolescents répartis dans 410 établissements scolaires. (A partir du résumé d'auteur)

ENGLISH :
Monitoring the Future (MTF), begun in 1975, is a long-term study of American adolescents, college students, and adults through age 45. It is conducted by the University of Michigans Institute for Social Research and is supported under a series of investigator-initiated, competing research grants from the National Institute on Drug Abuse. The need for a study such as Monitoring the Future is evident. Substance use by American young people has proven to be a rapidly changing phenomenon, requiring frequent assessments and reassessments. Since the mid-1960s, when illicit drug use burgeoned in the normal youth population, it has remained a major concern for the nation. Smoking, drinking, and illicit drug use are leading causes of morbidity and mortality, both during adolescence as well as later in life. How vigorously the nation responds to teenage substance use, how accurately it identifies the substance abuse problems that are emerging, and how well it comes to understand the effectiveness of the many policy and intervention efforts largely depend on the ongoing collection of valid and reliable data. Monitoring the Future is designed to generate such data in order to provide an accurate picture of what is happening in this domain and why. It has served that function quite well for over 30 years. The 2006 Monitoring the Future survey encompassed nearly 50,000 8th-, 10th-, and 12thgrade students in over 400 secondary schools nationwide. The first published results are presented in this report. Recent trends in the use of licit and illicit drugs are emphasized, as well as trends in the levels of perceived risk and personal disapproval associated with each drug. This study has shown these beliefs and attitudes to be particularly important in explaining trends in use. In addition, trends in the perceived availability of each drug are presented. A number of drugs showed declines in use in 2006. In general these one-year declines were modest, not statistically significant, and often confined to one grade; but in most cases they represented a continuation of earlier declines. A number of other drugs held steady in their use in 2006, again following decreases in use in prior years in almost all cases. Only four of the many classes of drugs under study showed any sign of increases in use this year - ecstasy, OxyContin, Vicodin, and inhalants - and even in those cases, the increases tended to be confined to one or two grades. (From the author' s abstract)