Scientists Found That Smoking Weed Doesn’t Actually Make You Stupid
A study done by Duke University in 2012 found that extreme marijuana use in adolescents and young adults correlates with a declined IQ. Since then, many researchers and studies have criticized that claim.
One journal found that the original research could not be accurate because of other contributing factors were not considered impacting cognitive development as well. These factors include cigarette use, alcohol abuse, mental illness, and socioeconomic classes.
There is one particular study where researchers examined a pair of twins. One twin had excessive marijuana use, while the other didn’t. The results showed that there was no difference in greater cognitive development when using marijuana.
The use of twins for data and research makes the argument stronger because the DNA is almost identical. Their everyday life is similar and their home environment is consistent.
"While persistent cannabis dependence may be linked to declining IQ across a person’s lifetime," the researchers write, "teenage cannabis use alone does not appear to predict worse IQ outcomes in adolescents."
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