Study Linking Pot Use and IQ Drop May be Wrong (1/22/13)
A new analysis of a report suggesting that regular marijuana use during the teen years can contribute to a drop in IQ may be incorrect.
The Proceedings of the National Academy of Sciences refuted the original Duke University study that found participants reported becoming dependent of pot by age 18 showed a drop in IQ score between 13 and 38.
Ole Rogeberg of the Ragnar Frisch Center for Economic Research in Oslo, says the IQ trend may have nothing to do with marijuana. Instead, he attributes the drop to differences in the socio-economic status, income, education, and occupation.
However, Rogeberg does not claim that his explanation is absolutely right. Rather, he says that the methods and evidence in the original study aren't enough to rule it out.
These findings have been disputed by Duke University. After learning of the Rogeberg analysis, University scientists conducted new statistical tests to assess his proposed explanation and concluded that it was wrong.
It "raises some interesting point and possibilities." but provides "speculation" rather than new data based on real people, said Dr. Duncan Clark, who is unconnected to either research projects and studies and alcohol and drug use in adolescents at the University of Pittsburgh.
Source: Huffington Post
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