Teen Use and the Gateway Theory
Reports and Studies
07/18/13 | Effects of State Medical Marijuana Laws on Adolescent Marijuana Use
Researchers at the Institute for Child Health Policy at the University of Florida College of Medicine examined what effect, if any, medical marijuana laws have on teen use. U.S. anti-drug officials like the drug czar have said such laws decrease the perception of risk and therefore lead to an increase in teen use. Looking at data from 2003-2011 from Montana, Rhode Island, Michigan, and Delaware, these researchers found "no discernible pattern suggesting an effect on either self-reported prevalence or frequency of marijuana use." They conclude that passage of medical marijuana laws does not measurably affect adolescent marijuana use.
04/26/13 | Do medical marijuana laws increase marijuana use? Replication study and extension.
Replicating a prior study, but controlling for state characteristics and measurement error, researchers found that medical marijuana laws have little discernible impact on teen marijuana use or perceptions of the risk of marijuana use in those states. In fact, their research showed that passage of medical marijuana laws actually resulted in a slight decrease in teen marijuana use.
07/13/12 | Medical Marijuana Laws and Teen Marijuana Use
Using data from the national and state Youth Risk Behavior Surveys and other government sponsored data collections, researchers from the Universities of Washington, Oregon, and Colorado at Denver found no association between medical marijuana laws and increased teen marijuana use. They concluded, "[o]ur results are not consistent with the hypothesis that legalization leads to increased use of marijuana by teenagers."
07/13/12 | Do medical marijuana laws increase marijuana use? Replication study and extension.
Replicating prior published study results that showed higher marijuana use rates in states with medical marijuana laws, researchers examined the link between those laws and teen marijuana use. Results showed that medical marijuana laws "decreased past-month use among adolescents by 0.53 percentage points and had no discernible effect on the perceived riskiness of monthly use," leading the authors to conclude that evidence linking medical marijuana laws to increased teen marijuana use was "limited."
07/13/12 | Prospective study of cannabis use in adolescents at clinical high risk for psychosis: impact on conversion to psychosis and functional outcome
Comparing 101 youths (ages 12-22) with positive symptoms of psychosis to 59 healthy controls of the same age over a period of three years, this study's authors found that, of those clinically predisposed to psychosis, those who used marijuana tended to demonstrate better social functioning. Results also showed that lifetime marijuana use or abuse did not lead to psychosis, even among those youths clinically predisposed to psychosis.

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08/06/11 | Opinion Piece | Collateral Sanctions, Medical Marijuana, Policy Alternatives, Presidential Candidates, Search and Seizure, Teen Use, Victims The Case For Medical Marijuana
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08/06/11 | Opinion Piece | Collateral Sanctions, Marijuana Market / Economy, Medical Marijuana, Policy Alternatives, Science, Studies, and Research, Teen Use, Victims 3 Myths About Marijuana

Updates
09/11/13 | News | Legalization, Teen Use King County sheriff promises crackdown on public, underage pot smoking
01/22/13 | News | Teen Use The war on pot is no safe bet
01/07/13 | Press Release | Science, Studies, and Research, Teen Use Annual National Survey Finds Teen Marijuana Use Down Slightly Since 2011
03/13/12 | News | Courts and Justice System, Legalization, Removal of penalties / Decriminalization, Teen Use, Victims Grand jury releases findings on the death of Eric Perez
12/20/11 | Blog | Science, Studies, and Research, Teen Use Teen Marijuana Use Continues to Rise Despite High Arrest Rates

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