Recent longitudinal cohort studies investigating the relationship between heavy marijuana use and risk for developing psychosis
A) show that there is no relationship between the two.
B) indicate that early, heavy use of marijuana decreases the risk of later psychosis.
C) suggest that early, heavy marijuana use doubles the risk of later development of psychotic symptoms.
D) cannot be taken seriously because of individual differences.

Question

Quizplus · Accepted Answer

Recent longitudinal cohort studies have found a significant association between early, heavy marijuana use and an increased risk of developing psychotic symptoms later in life, suggesting that such use may double the risk.

Recent Longitudinal Cohort Studies Investigating the Relationship Between Heavy Marijuana