[nilolo]

I would be interested in this as well, but how do you measure creativity? Data on long-term effects of marijuana is rare to come by and that's when we are looking at a clear metric like IQ.

[pythonwutang]

There are a couple tests available that measure divergent thinking, which is a part of creativity, but I’m not aware of any others.

There certainly is an abundance of anecdotal evidence that marijuana boosts creativity from artists and musicians.