My husband has ADD and I have bipolar. When he was diagnosed I took the ADD test for fun, :P I actually scored worse than he did, and he had a very bad score. I was surprised, I never considered that I might have ADD. But, in my research I discovered that a lot of ADD and bipolar symptoms are similar. (Lack of focus, difficulty making decisions, easily frustrated, jumping from topic to topic, etc.) I know you can have both, too.

That's really all I know about it.