2) If his hearing is fine, then I'm goin to say it could be slow processing. Executive cognitive function is not IQ. It is things like organization (like being able to prioritize tasks or keep a room clean,) memory, focus, and processing. It's just like a computer. You know when you watch a YouTube video and it says "buffering?" Well, the brain is kind of the same way with information. . Processing decline is one of my cognitive skills that's declined very noticablely.

Thank you faerie. Your description of "buffering" is perfect! That's EXACTLY what it sometimes looks like when it happens.
So it must be some sort of processing problem (when it's happening) then?
His hearing is fine. He's not a kid anymore though, he's in his early 20's now.
One reason why I did ignore it over the years is because it IS so typical of young kids to ignore and not 'hear' when they're not interested.
THANKS