In response to a recent study that revealed that THC seeps deeply into the prefrontal cortex of the brain, "Radar" performed their own small study. They wanted to see for themselves how impaired an average pot smoker was. With the help of a friendly researcher at a primate psych lab, Venkat Lakshminarayanan, two stoned adults and two sober six year-olds, they set out to see how their subjects would do on a small series of tests.
Go here, to find out how well their potheads fared compared to the kids as well as monkeys, toddlers and mentally ill patients who have taken the same tests. Some of the tests and results were a bit surprizing I found.