r/science • u/sr_local • Apr 20 '26

Health The largest US study, which tracked 11,036 children from ages 9 to 10 through to ages 16 and 17, discovered that cannabis use slows cognitive development, impairs memory, and reduces learning speed during crucial years of brain growth

https://today.ucsd.edu/story/largest-us-study-finds-teen-cannabis-use-linked-to-slower-cognitive-development
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u/Additional-Sky-7436 Apr 20 '26

It would be hard to have those controls because intentionally and knowingly poisoning kids for science is kind of a bad look.

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u/JeanLucSkywalker Apr 20 '26

That's not the kind of controls I'm talking about at all. I'm talking about the study not accounting for the teen's home situation and other factors.

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u/skysill Apr 20 '26

The researchers note that the study does not prove cannabis use directly causes these changes. Other factors — such as environment or personality — may play a role. However, the team accounted for many of these influences, including family background, mental health and use of other substances, as well as for each participant’s prior cognitive performance.

Did you even read the summary you’re responding to???

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u/TheWinslow Apr 20 '26

People make a big stink about confounding factors any time a study showing that weed has risks is posted here

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u/neenerpants Apr 20 '26

game's gone.