Here is the study: https://onlinelibrary.wiley.com/doi/abs/10.1111/add.15764
> residual neurocognitive deficits were observed in heavy cannabis-using youths Emphasis on youth . Tl;dr clickbait headline, don’t let your kids smoke a lot of pot, if that wasn’t already obvious.
Early use of cannabis was correlated with worse outcomes, but those who started later in life were still associated with deficits in the studies surveyed.
> To conclude, meta-analytical data on the acute effects of cannabis use on neurocognitive function have shown that cannabis intoxication leads to small to moderate deficits in numerous cognitive domains, most notably executive functions, verbal learning and memory and processing speed. These acute impairments are in accordance with the residual effects that have been documented in several meta-analyses suggesting that the detrimental effects of cannabis persist beyond the period of acute intake.
and
> Additionally, as youths remain particularly susceptible to the effects
Are both in their conclusion and paint a more complete tl;dr.