"The study suggests that the effects of cannabis use on verbal intelligence are explained not by neurotoxic effects on the brain, but rather by a possible social mechanism," said lead author Natalie Castellanos-Ryan, Assistant Professor at Universite de Montreal in Canada
Links
[1] http://www.business-standard.com/article/news-ians/marijuana-use-in-early-adolescence-may-affect-verbal-iq-117012600622_1.html
[2] http://rethinkpot.org/tags/iq
[3] http://rethinkpot.org/tags/youth-usage
[4] http://rethinkpot.org/tags/brain