The Causal Effect of Cannabis on Cognition


Does smoking lots of pot make you dumb or do dumb people smoke lots of pot? Mostly, the latter. Ross et al. (2019) write : Although many researchers have concluded that cannabis causes impairment in cognition, there are alternative explanations. First, poor cognitive functioning is a risk factor for substance use. Specifically, EF measured in childhood predicts later substance use and substance use disorders (SUDs; Ridenour et al., 2009 ).

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