Category: intelligence

Study Finds “Little Support” for Cannabis Impacting Cognitive Abilities

The occasional use of cannabis during late adolescence is not independently associated with adverse effects on cognitive abilities in young adulthood, according to longitudinal data published in the journal Drug and Alcohol Dependence. A team of investigators affiliated with the University of Colorado at Boulder assessed the impact of cannabis use on cognition, executive function, and working memory in 856 individual twins. Cannabis consumers were compared to their non-using twins in late adolescence and then again in their early twenties. Most of the cannabis consuming participants in the study reported occasional use of the substance, but not daily use. Authors found “little support for a causal effect of cannabis use on cognition. This conclusion is consistent with those from previous…

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Yet Another Study Finds That Cannabis Use Is Not Independently Linked With IQ Decline

Cannabis use by teens is not independently linked with adverse changes in intelligence quotient or executive functioning, according to longitudinal data published online ahead of print in the journal Addiction. Investigators concluded, “Short-term cannabis use in adolescence does not appear to cause IQ decline or impair executive functions, even when cannabis use reaches the level of dependence.”

Latest Media Buzz Regarding Pot’s Potential Impact On IQ Misses The Bigger Issue

The mainstream press has been abuzz in recent days regarding the findings of a recent study suggesting that early-onset, persistent cannabis exposure by those under age 18 could potentially pose adverse effects on intelligence quotient. Yet, absent from the media’s discussion of the study — a discussion that has even included some fairly critical reviews of the study’s methodology (See here and here for just two examples.) — is any talk of the role that marijuana prohibition plays in inadvertently steering young people toward cannabis, an issue I address in […]