Does researching casual marijuana use cause brain abnormalities?

The recent “findings” that casual marijuana use causes brain abnormalities lit up my Facebook news feed over the last few days. I had to admit, I was suspicious, but didn’t look into it any further. Lion Pachter has written a great critical analysis of this study, and how warped its findings have been by the researchers and the media. This is fairly ridiculous, and a bit scary in how quickly bad science can be reported by the media. Pachter goes on to say:

“I believe that scientists should be sanctioned for making public statements that directly contradict the content of their papers, as appears to be the case here. There is precedent for this.”

Bits of DNA

In reading the news yesterday I came across multiple reports claiming that even casually smoking marijuana can change your brain. I usually don’t pay much attention to such articles; I’ve never smoked a joint in my life. In fact, I’ve never even smoked a cigarette. So even though as a scientist I’ve been interested in cannabis from the molecular biology point of view, and as a citizen from a legal point of view, the issues have not been personal. However reading a USA Today article about the paper, I noticed that the principal investigator Hans Breiter was claiming to be a psychiatrist and mathematician. That is an unusual combination so I decided to take a closer look. I immediately found out the claim was a lie. In fact, the totality of math credentials of Hans Breiter consist of some logic/philosophy courses during a year abroad at St. Andrews while he was a pre-med student…

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