I can often concentrate better on certain things while listening to music - studying and driving being two of them. I am very distractable in certain ways (my parents had me tested for epilepsy as a child because I would often "stare into space" for long periods, but I wasn't having a seizure, I was just fascinated by something like the weave of the carpet, etc.) and the music acts as a safe, controlable distraction. The music doesn't make me drive off the road, but becoming mesmerized by the patterns in the grass of a field or watching the next car's off-balance wheel might.
