Total noob here. Is there a reference book about ADHD I could read?
What are the things "most people" agree ADHD "is"?
What are the things "most people" agree ADHD "is"?
You find yourself unable to focus on what you know needs to be done, quite possibly because you're unable to tear your focus away from something else.
Inattention, impulsivity, hyperfocus, hyperactivity. Adult ADHD does not often involve physical hyperactivity.
Hyperfocus can be an incredible boon if you happen to be hyperfocused on something useful. But the catch is that it's not a switch you can flip at all and you can't necessarily choose what you're focused on.
There are different subtypes such as "primarily inattentive" etc.
A lot of people don't believe in ADHD or think it's a "lack of discipline" etc.
Like many disorders, symptoms of ADHD are things everybody experiences to an extent and it becomes a "disorder" when it starts to impact one's functioning. In much the way that everybody is sad sometimes but when it becomes pervasive we call it a disorder called "depression."
I think what I've said above is all mostly universally agreed upon.
People with adult hyperactive/impulsive or combined type ADHD often don't think of this as hyperactivity, partly because they're so used to it they're barely aware of it, or the fact that it's not normal.