I have never bought the lower IQ arguement. I personally love to get high and take IQ tests or work on intellectual puzzles of some kind--always seem to do better when I have imbibed a bit. And I am one of those people who have used cannabis for decades--took my first toke in 1967 and fell in love with it. About the only time I didn't have bud is if I was too poor to buy it.
I believe my cannabis habit is why I am not on a thousand prescription drugs (like most people I know).
Sounds as if it may keep you from being uptight when taking the tests, so your natural IQ is allowed to beam through and not stiffled due to test uptightness. And I know nothing about it, but that would make sense to me.
I actually think it has more to do with my mind being able to see things in broader ways after I have been smoking. A lot of IQ type tests have things like what is the next number in the sequence hat does this box look like when flattened out (or vice versa). I think that cannabis can open our minds.
Medical marijuana uses the marijuana plant or chemicals in it to treat diseases or conditions. It's basically the same product as recreational marijuana, but it's taken for medical purposes.The marijuana plant contains more than 100 different chemicals called cannabinoids. Each one has a different effect on the body. Delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) are the main chemicals used in medicine.