I don't know if any in this forum has experienced skepticism from others when you tell them you have ADHD. It always happens to me! It frustrates me and makes me feel like understanding from others is 43 billion light-years from Earth.
Every time I tell someone I have ADHD they answer something like: "But you don't seem to have it." Do I really need to "seem" to have it? Do I have to be running around and saying inappropriate things in order for me to be ADHD? I don't think so. Especially since I am 21, and the condition changes with age. It obviously will never be the same. What makes my heart ache is that some of those people would rather ascribe my behavior to some sort of character flaw. That couldn't be further from the truth. For years I have felt horrible because of my behavior and have struggled to be more attentive.
Some of them may have good intentions, but they are doing a disservice to me by not accepting that I have a disorder. If they did they would be more understanding and a lot of things would be answered.
I did excellently on several variations of the Stroop task, but that may be due to my ability to hyperfocus. I still do badly at tasks that require you to divide your attention, i.e., I can't multitask. I can read and comprehend while I walk, though. I also don't listen to some conversations that are under stimulating, even though I try to do so. But if the conversation is about anything scientific or academic then I am on. I can basically focus on anything that interests me for as long as I want, and I guess that's why people think I don't have the condition. But that doesn't mean I am not ADHD since according to the diagnostic criteria we still can focus on things we like. I am also horrible at finding things for others That has followed me my entire life and it is like a small imp that never stops its shenanigans. I hate to look for things to be honest. Especially since I always fail. The only times I am good are when I am interested and it is something that will cultivate my mind, like finding a mistake on a book (which I have done so before and got praised by the author for my careful reading).
(I also take long to get started on things, and find it almost painful to do so).