Study: Rubber Soul might've been better if the Beatles weren't so stoned

The Beatles often give marijuana use at least part of the credit for the artistic breakthroughs present on the Rubber Soul  album in 1965. But would it have been better without the dope?

A new study says maybe so, putting the lie to the idea that pot helps spur creativity.
Dutch scientists have discovered that smoking pot does not make people more creative. In fact, it has the opposite effect. 
Smokers who inhaled the most amount of Tetrahydrocannabinol (THC) - the psychoactive ingredient in cannabis – did less well on cognitive and free thinking tests, the University of Leiden found. 
...’Rubber Soul’ was the pot album and Revolver was the acid, John Lennon explained in 1972.

Although he added: “The drugs are to prevent the rest of the world from crowding in on you. They don’t make you write any better.”

...“The research findings contradict the claims of people who say that their thinking changes and becomes more original after smoking a joint,” said Dr Lorenza Colzato.

“There’s no sign of any increased creativity in their actual performance. The improved creativity that they believe they experience is an illusion."

And they found that too much dope is actually counterproductive.

“If you want to overcome writer’s block or any other creative gap, lighting up a joint isn’t the best solution," added Dr Colzato.

"Smoking several joints one after the other can even be counterproductive to creative thinking.”