Research suggests another factor responsible for both marijuana use, decline in intelligence
NEW YORK — A new analysis is challenging the idea that smoking marijuana during adolescence can lead to declines in intelligence.
Instead, the new study says, pot smoking might be merely a symptom of something else that’s really responsible for a brainpower effect seen in some previous research.
It’s not clear what that other factor is, said Joshua Isen, an author of the analysis. But an adolescent at…