Researchers at the University of Pittsburgh and Rutgers University have issued a correction to their original report that teen marijuana use had no effect on the development of a psychotic order by age 36.
Meanwhile, a hospital in Washington, the first state to legalize marijuana, reports 1-2 new cases of admissions for marijuana-induced psychosis each day.
The full length version of their published correction, which can be purchased for ~$11 online, reveals that in fact their data showed a trend towards a 2.5-fold greater prevalence of psychotic disorders in the marijuana users, a trend which reached significance in a “one-tailed” statistical test. Such a test is generally deemed appropriate if abundant prior studies have shown the same degree and direction of effect, as is the case here. Continue reading Updates on the Marijuana Psychosis Link