When I first went to college I was a psych major. Early in my second semester I had read something about state dependent learning. The theory is that if you learn something under while in a certain state of mind (stressed, relaxed, depressed, etc) you can better apply that knowledge while in that same state of mind. So, being the weed smoking, psych major that I was I decided to do an experiment. Every night before a big exam in my abnormal psych class I would get really high before studying. Then the next day, just before my exam, I would also get really high. I did this for every test or exam that semester. Unfortunately, I failed to have anything to judge my results against, such as high studying/ not high during exam, so I couldn't really prove if my experiment worked. I did get an A in the class though.