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Thursday, October 23rd, 2014

No, marijuana use doesn’t lower your IQ

Author:     Christopher Ingraham
Source:     THe Washington Post
Publication Date:     October 22 at 10:39 AM
 Link: No, marijuana use doesn’t lower your IQ
Stephan:   It is fascinating to watch the prohibitionist disinformation campaign. I am sure the brighter ones -- the others are just tools who repeat the talking points they are given -- know they will be refuted based on the data.  The game though is that not everyone will see the refutation, and if one lies over and over a certain number of people will not learn about the lie each time. It is so cynical and ethically compromised that it should be a national scandal. Instead it is just business as usual, and thousands of people -- mostly people of color -- continue to have their lives destroyed through marijuana arrests.
A woman uses a electronic vaporizers with cannabidiol (CBD)-rich hemp oil while attending the International Cannabis Association Convention in New York, October 12, 2014. Credit: REUTERS/Eduardo Munoz

A woman uses a electronic vaporizers with cannabidiol (CBD)-rich hemp oil while attending the International Cannabis Association Convention in New York, October 12, 2014. Credit: REUTERS/Eduardo Munoz

A 2012 Duke University study made international headlines when it purported to find a link between heavy marijuana use and IQ decline among teenagers. Other researchers questioned the findings almost immediately: Columbia University’s Carl Hart noted the very small sample of heavy users (38) in the study, leading him to question how generalizable the results were.

Then, a follow-up study published 6 months later in the same journal found that the Duke paper failed to account for a number of confounding factors: “Although it would be too strong to say that the results have been discredited, the methodology is flawed and the causal inference drawn from the results premature,” it concluded.

Now, a new study out from the University College of […]

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