Just the smell of coffee alone could boost your brain's performance.

Just the smell of coffee alone could boost your brain's performance. Participants in a recent study were given a test. Half the group took the test in a room that smelt like coffee, while the other half were in a room with no smell. Participants in the coffee-smelling room performed significantly better. Scientists think that rather than having a chemical effect, the smell of coffee had a placebo effect. People associated the smell with caffeine and their brains reacted as if they had actually drank the coffee.