For readers, ODD == Oppositional Defiant Disorder.

Basically ADHD is just a symptom checklist, what causes it also causes a whole variety of other stuff not included in the same checklist for somewhat @political" reasons.

In particular ODD means being reflexively and exaggeratedly defiant and hostile to authority. Possibly because its associated with external demands that are inherently difficult to meet (because of the ADHD part) and so quite tortuous and frustrating.

What's remarkable is that the oppositional characteriststs associated wiith ADHD are significantly helped by stimulants. Which doesnt make any sense, if the oppositionality were some personality characteristic. It arises due to the very same cognative impairments.