It appears that the statistical data that was used to conduct the research that suggested smoking marijuana during teen years lowers the IQ later in life is flawed.
The study that has been challenged, consisted of 1000 people who had been born in Dunedin, New Zealand. The I.Q. levels were then tested in participants between the ages of 13-38 and were asked periodically about the use of marijuana or pot between those age limits. The researchers at different universities then concluded that the participants who had smoked pot at the age of eighteen had a comparatively lower IQ in their later ages.
An online analysis of the research that has been published recently suggests that the lowering of IQ might not have anything to do with smoking pot but it is related to the SES, socioeconomic status, of the individuals.
The socio-economic factor includes several factors like education, income and occupation. And according to Ole Rogeberg, who made this assessment on the basis of computer stimulation, the SES might be the reason of the lowering of IQ in people. When his analysis was put forward to the original study researchers in New Zealand, they decided to review the research all over again with Rogeberg’s suggestions and have found that his analysis is wrong.
Surely after reading any study, that confirms the harmful effects of smoking pot on human health, people tend to keep away from drugs, at least people who want to live with an adequate IQ. Indeed Rogeberg’s analysis is in no way defending the use of marijuana, but many people are criticizing his study like Dr.Duncan Clark from University of Pittsburg who specializes in drug abuse studies and Dr. Nora Volkow from National Institute on Drug Abuse.
While nothing permanent can be derived from the two different studies, fact remains that consuming marijuana is injurious to health, if not to the brain.