Paul Armentano, Senior Policy Analyst at the National Organization for the Reform of Marijuana Laws (NORML), stated in an Aug. 2, 2007 press release titled "NORML Responds to New Rash of Pot and Mental Health Claims":

“Despite the enormous popularity of cannabis in the 1960s and 1970s in numerous Western cultures, rates of psychotic disorders haven’t increased since then in any of these societies. Individuals suffering from mental illness such as schizophrenia tend to use all intoxicants – particularly alcohol and tobacco – at greater rates than the general population. Not surprisingly, many of these individuals also use cannabis.”

Aug. 2, 2007