This reply was originally posted by user adhdmomma in ADDitude’s now-retired community.
It’s important to recognize that the ADHD brain is motivated and focused by things of interest, not by importance: http://www.additude.com/adhd/article/10117.html.
That explains why he can follow-through successfully for tasks he is interested in, but not at other times.
Stopping the yelling in your household can make a huge difference. Yelling can provide the stimulation lacking in the brains of those with ADHD. While he doesn’t want to be in trouble with you and doesn’t want you yelling at him, it can serve a purpose neurologically.
You must model the behavior you want to see from him.
Here’s some help with managing your son’s oppositional behavior too:
ADDconnect Moderator, Author on Parenting ADHD, Mom to teen boy with ADHD, LDs, and autism