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Length: 4:59 Minutes | View TranscriptListen Now:September 16, 2013-
Dr. Madeline Meier of Duke University discusses the effects of marijuana use on IQ. Dr. Meier describes findings from a 25-year study showing that participants who initiated weekly cannabis use before age 18 dropped IQ points in proportion to how long they persisted in using the drug.
Read the NIDA Notes article about the study, Early Onset, Regular Cannabis Use Is Linked to IQ Decline.