They hypothesized that frequent and dependent cannabis use in youth would be associated with IQ decline, then did a review and meta-analysis of other studies to prove their point:

We identified 2875 papers and conference abstracts for screening after removal of duplicates. We identified 33 papers for full-text screening. We included seven studies that met our criteria.

So, from all the 2875 sources they found, they selected the 7 that together could prove that their hypothesis was right.

https://www.cambridge.org/core/journals/psychological-medicine/article/intelligence-quotient-decline-following-frequent-or-dependent-cannabis-use-in-youth-a-systematic-review-and-metaanalysis-of-longitudinal-studies/26BEC9CBD2A39010C26100278F8CA813

All my pot head friends are sheep. Masked up video gaymers with mediocre jobs. They know nothing about politics other than base line MSN fed to them through social media.

You cannot be as productive on weed as you could be otherwise. Anyone who refutes this is lying to themselves, or the anomaly.

It may not make you less intelligent, but it sure isn't helping.

It was fun when we were young and high, but as adults, I just do not see the appeal of being high everyday

Imagine thinking a CNS-growth enhancing and gray-matter creating drug could lower your IQ......

fucking morons who think weed makes you dumb, ALCOHOL makes you dumb, not weed.

Weed makes your brain and cells communicate better with each other.

dailystormer your most credible news source

seriously