>>9
Music usually enables focusing because people rarely use new music as background music, while as tv runs new stuff all the time.
This creates a comfortable, recogniseable background static that mostly drowns out other stuff, yet is ignorable because it doesn't contain any new information you might need to focus on, nor use as an as good excuse as new music.

I have attention problems but TV works for me, sometimes. Provided things I know is not interesting for me are running, nothing that's too slow like series episodes, those are dangerous. Music channels are good for that, in spite of having new music sometimes. I usually do best working at school, though. It's more difficult to slack off and surf randomly on the internet when there are others in the same room, working hard.

Oh, another thing I've noticed... My attention span goes from bad to utterly horrible, when I'm not properly hydrated (i.e. drinking a sip of water often is good, rather than drinking a lot of water once every few hours). I've done some diet changes as well that helped my attention span by making my blood sugar stay more stable throughout the day (whole grain products, a lot of fresh greens, etc).